Disable Travis CI

Remove Travis profile
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index a5e2016..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,34 +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.
-
-language: java
-sudo: false
-
-cache:
-  directories:
-    - $HOME/.m2
-jdk:
-  - openjdk8
-  - openjdk11
-
-# Skip the installation step:
-#   https://docs.travis-ci.com/user/job-lifecycle/#skipping-the-installation-phase
-install: true
-
-script:
-  - mvn
-
-after_success:
-  - mvn jacoco:report coveralls:report
diff --git a/pom.xml b/pom.xml
index 1a97d6c..f286e24 100644
--- a/pom.xml
+++ b/pom.xml
@@ -82,9 +82,6 @@
     <rng.jgit.buildnumber.version>1.2.10</rng.jgit.buildnumber.version>
     <implementation.build>${git.revision}; ${maven.build.timestamp}</implementation.build>
 
-    <!-- Override default buildNumber timestamp format, needed for coveralls plugin -->
-    <maven.buildNumber.timestampFormat>{0,date,yyyy-MM-dd HH:mm:ssZ}</maven.buildNumber.timestampFormat>
-
     <!--
         Override so that "mvn commons:download-page" will generates a web page
         referring to the files created by the "dist-archive" module.
@@ -694,33 +691,6 @@
       </build>
     </profile>
 
-    <profile>
-      <id>travis</id>
-      <activation>
-        <property>
-          <name>env.TRAVIS</name>
-          <value>true</value>
-        </property>
-      </activation>
-      <build>
-        <plugins>
-          <plugin>
-            <groupId>org.jacoco</groupId>
-            <artifactId>jacoco-maven-plugin</artifactId>
-            <version>${commons.jacoco.version}</version>
-          </plugin>
-          <plugin>
-            <groupId>org.eluder.coveralls</groupId>
-            <artifactId>coveralls-maven-plugin</artifactId>
-            <version>4.3.0</version>
-            <configuration>
-              <timestampFormat>${commons.coveralls.timestampFormat}</timestampFormat>
-            </configuration>
-          </plugin>
-        </plugins>
-      </build>
-    </profile>
-
     <!--
         Profiles for modules with special requirements.
     -->