docs: Replace JIRA with GitHub Issues

And some general cleanup.
diff --git a/README.md b/README.md
index c53ccbb..ff6f162 100644
--- a/README.md
+++ b/README.md
@@ -68,8 +68,7 @@
 
 ## Features
 
-Parquet is a very active project, and new features are being added quickly. Here are a few features:
-
+Parquet is an active project, and new features are being added quickly. Here are a few features:
 
 * Type-specific encoding
 * Hive integration (deprecated)
@@ -96,7 +95,9 @@
 
 ## Java Vector API support
 `The feature is experimental and is currently not part of the parquet distribution`.
+
 Parquet-Java has supported Java Vector API to speed up reading, to enable this feature:
+
 * Java 17+, 64-bit
 * Requiring the CPU to support instruction sets:
   * avx512vbmi
@@ -116,26 +117,29 @@
 We've implemented this for 2 popular data formats to provide a clean migration path as well:
 
 ### Thrift
+
 Thrift integration is provided by the [parquet-thrift](https://github.com/apache/parquet-java/tree/master/parquet-thrift) sub-project.
 
 ### Avro
+
 Avro conversion is implemented via the [parquet-avro](https://github.com/apache/parquet-java/tree/master/parquet-avro) sub-project.
 
 ### Protobuf
+
 Protobuf conversion is implemented via the [parquet-protobuf](https://github.com/apache/parquet-java/tree/master/parquet-protobuf) sub-project.
 
 ### Create your own objects
+
 * The ParquetOutputFormat can be provided a WriteSupport to write your own objects to an event based RecordConsumer.
 * The ParquetInputFormat can be provided a ReadSupport to materialize your own objects by implementing a RecordMaterializer
 
 See the APIs:
+
 * [Record conversion API](https://github.com/apache/parquet-java/tree/master/parquet-column/src/main/java/org/apache/parquet/io/api)
 * [Hadoop API](https://github.com/apache/parquet-java/tree/master/parquet-hadoop/src/main/java/org/apache/parquet/hadoop/api)
 
 ## Hive integration
 
-Hive integration is provided via the [parquet-hive](https://github.com/apache/parquet-java/tree/master/parquet-hive) sub-project.
-
 Hive integration is now deprecated within the Parquet project. It is now maintained by Apache Hive.
 
 ## Build
@@ -178,22 +182,22 @@
 
 ### How To Contribute
 
-We prefer to receive contributions in the form of GitHub pull requests. Please send pull requests against the [parquet-java](https://github.com/apache/parquet-java) Git repository. If you've previously forked Parquet from its old location, you will need to add a remote or update your origin remote to https://github.com/apache/parquet-java.git
+We prefer to receive contributions in the form of GitHub pull requests. Please send pull requests against the [parquet-java](https://github.com/apache/parquet-java) Git repository. If you've previously forked Parquet from its old location, you will need to add a remote or update your origin remote to `https://github.com/apache/parquet-java.git`.
 
-If you are looking for some ideas on what to contribute, check out jira issues for this project labeled ["pick-me-up"](https://issues.apache.org/jira/browse/PARQUET-5?jql=project%20%3D%20PARQUET%20and%20labels%20%3D%20pick-me-up%20and%20status%20%3D%20open).
-Comment on the issue and/or contact [dev@parquet.apache.org](http://mail-archives.apache.org/mod_mbox/parquet-dev/) with your questions and ideas.
+If you are looking for some ideas on what to contribute, check out [GitHub issues](https://github.com/apache/parquet-java/issues) for labeled [Good first issue](https://github.com/apache/parquet-java/issues?q=state%3Aopen%20label%3A%22Good%20first%20issue%22). Comment on the issue and/or contact [dev@parquet.apache.org](https://lists.apache.org/list.html?dev@parquet.apache.org) with your questions and ideas.
 
-If you’d like to report a bug but don’t have time to fix it, you can still post it to our [issue tracker](https://issues.apache.org/jira/browse/PARQUET), or email the mailing list [dev@parquet.apache.org](http://mail-archives.apache.org/mod_mbox/parquet-dev/)
+If you’d like to report a bug but don’t have time to fix it, you can still raise an [issue on GitHub](https://github.com/apache/parquet-java/issues/new/choose), or email the mailing list [dev@parquet.apache.org](https://lists.apache.org/list.html?dev@parquet.apache.org).
 
 To contribute a patch:
 
   1. Break your work into small, single-purpose patches if possible. It’s much harder to merge in a large change with a lot of disjoint features.
-  2. Create a JIRA for your patch on the [Parquet Project JIRA](https://issues.apache.org/jira/browse/PARQUET).
-  3. Submit the patch as a GitHub pull request against the master branch. For a tutorial, see the GitHub guides on forking a repo and sending a pull request. Prefix your pull request name with the JIRA name (ex: https://github.com/apache/parquet-java/pull/240).
+  2. Create an issue for your patch on the [GitHub issues](https://github.com/apache/parquet-java/issues).
+  3. Submit the patch as a GitHub pull request against the master branch. For a tutorial, see the GitHub guides on forking a repo and sending a pull request. Prefix your pull request name with the issue (ex: https://github.com/apache/parquet-java/pull/3260).
   4. Make sure that your code passes the unit tests. You can run the tests with `./mvnw test` in the root directory.
   5. Add new unit tests for your code.
 
 We tend to do fairly close readings of pull requests, and you may get a lot of comments. Some common issues that are not code structure related, but still important:
+
   * Use 2 spaces for whitespace. Not tabs, not 4 spaces. The number of the spacing shall be 2.
   * Give your operators some room. Not `a+b` but `a + b` and not `foo(int a,int b)` but `foo(int a, int b)`.
   * Generally speaking, stick to the [Sun Java Code Conventions](http://www.oracle.com/technetwork/java/javase/documentation/codeconvtoc-136057.html)
@@ -204,18 +208,20 @@
 ## Authors and contributors
 
 * [Contributors](https://github.com/apache/parquet-java/graphs/contributors)
-* [Committers](dev/COMMITTERS.md)
+* [Committers](https://projects.apache.org/committee.html?parquet)
 
 ## Code of Conduct
 
 We hold ourselves and the Parquet developer community to two codes of conduct:
+
   1. [The Apache Software Foundation Code of Conduct](https://www.apache.org/foundation/policies/conduct.html)
   2. [The Twitter OSS Code of Conduct](https://github.com/twitter/code-of-conduct/blob/master/code-of-conduct.md)
 
 ## Discussions
-* Mailing list: [dev@parquet.apache.org](http://mail-archives.apache.org/mod_mbox/parquet-dev/)
-* Bug tracker: [jira](https://issues.apache.org/jira/browse/PARQUET)
-* Discussions also take place in github pull requests
+
+* Mailing list: [dev@parquet.apache.org](https://lists.apache.org/list.html?dev@parquet.apache.org)
+* GitHub issues: [Issues](https://github.com/apache/parquet-java/issues)
+* Discussions also take place in GitHub pull requests
 
 ## License
 
diff --git a/dev/COMMITTERS.md b/dev/COMMITTERS.md
deleted file mode 100644
index f861cda..0000000
--- a/dev/COMMITTERS.md
+++ /dev/null
@@ -1,66 +0,0 @@
-<!--
-  ~ Licensed to the Apache Software Foundation (ASF) under one
-  ~ or more contributor license agreements.  See the NOTICE file
-  ~ distributed with this work for additional information
-  ~ regarding copyright ownership.  The ASF licenses this file
-  ~ to you under the Apache License, Version 2.0 (the
-  ~ "License"); you may not use this file except in compliance
-  ~ with the License.  You may obtain a copy of the License at
-  ~
-  ~   http://www.apache.org/licenses/LICENSE-2.0
-  ~
-  ~ Unless required by applicable law or agreed to in writing,
-  ~ software distributed under the License is distributed on an
-  ~ "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-  ~ KIND, either express or implied.  See the License for the
-  ~ specific language governing permissions and limitations
-  ~ under the License.
-  -->
-
-# Committers (in alphabetical order):
-
-The official list of committers can be found here: [Apache Parquet Committers and PMC](http://people.apache.org/committers-by-project.html#parquet)
-
-Below is more information about each committer (in alphabetical order). If this information becomes out of date, please send a PR to update!
-                                                                
-| Name               | Apache Id    | github id       | JIRA id      |
-|--------------------|--------------|-----------------|--------------|
-| Alex Levenson      | alexlevenson | @isnotinvain    | alexlevenson |                            
-| Aniket Mokashi     | aniket486    | @aniket486      |              |
-| Brock Noland       | brock        | @brockn         |              |
-| Cheng Lian         | lian         | @liancheng      | liancheng    |
-| Chris Aniszczyk    | caniszczyk   | @caniszczyk     |              |
-| Chris Mattmann     | mattmann     | @chrismattmann  |              |
-| Daniel C. Weeks    | dweeks       | @danielcweeks   |              | 
-| Dmitriy Ryaboy     | dvryaboy     | @dvryaboy       |              |
-| Fokko Driesprong   | Fokko        | @Fokko          | fokko        |
-| Gang Wu            | gangwu       | @wgtmac         |              |
-| Gidon Gershinsky   | gershinsky   | @ggershinsky    | gershinsky   |
-| Jake Farrell       | jfarrell     |                 |              |
-| Jonathan Coveney   | jcoveney     | @jcoveney       |              |
-| Julien Le Dem      | julien       | @julienledem    | julienledem  |
-| Lukas Nalezenec    | lukas        | @lukasnalezenec |              |
-| Marcel Kornacker   | marcel       | @mkornacker     |              |
-| Mickael Lacour     | mlacour      | @mickaellcr     |              |
-| Nong Li            | nong         | @nongli         |              |
-| Remy Pecqueur      | rpecqueur    | @Lordshinjo     |              |
-| Roman Shaposhnik   | rvs          | @rvs            |              |
-| Ryan Blue          | blue         | @rdblue         |              |
-| Sergio Pena        | spena        | @spena          | spena        |
-| Tianshuo Deng      | tianshuo     | @tsdeng         |              |
-| Todd Lipcon        | todd         | @toddlipcon     |              |
-| Tom White          | tomwhite     | @tomwhite       |              |
-| Wes McKinney       | wesm         | @wesm           |              |
-| Wesley Graham Peck | wesleypeck   | @wesleypeck     |              |
-| Xinli Shang        | shangxinli   | @shangxinli     |              |
-
-
-# Reviewing guidelines:
-Committers have the responsibility to give constructive and timely feedback on the pull requests.
-Anybody can give feedback on a pull request but only committers can merge it.
-
-First things to look at in a Pull Request:
- - Is there a corresponding JIRA, and is it mentioned in the description? If not ask the contributor to make one.
- - If a JIRA is open, make sure it is assigned to the contributor. (they need to have the contributor role here: https://issues.apache.org/jira/plugins/servlet/project-config/PARQUET/roles)
- - Is it an uncontroversial change that looks good (has apropriate tests and the build is succesful)? => merge it
- - Is it something that requires the attention of committers with a specific expertise? => mention those committers by their github id in the pull request.