removing one-off source release assemblies (and config), then upgrading parent version for all shared projects up to 12, so source-release will be automatic.

git-svn-id: https://svn.apache.org/repos/asf/maven/shared/trunk@815892 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
index 3096600..ac25412 100644
--- a/pom.xml
+++ b/pom.xml
@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="UTF-8"?>
+<?xml version='1.0' encoding='UTF-8'?>
 <!--
  Licensed to the Apache Software Foundation (ASF) under one
  or more contributor license agreements.  See the NOTICE file
@@ -17,13 +17,13 @@
  specific language governing permissions and limitations
  under the License.
 -->
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xsi:schemaLocation='http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd' xmlns='http://maven.apache.org/POM/4.0.0'>
   <modelVersion>4.0.0</modelVersion>
 
   <parent>
     <groupId>org.apache.maven.shared</groupId>
     <artifactId>maven-shared-components</artifactId>
-    <version>11</version>
+    <version>12</version>
   </parent>
 
   <artifactId>maven-osgi</artifactId>