Revert "[maven-release-plugin] prepare release warnings-ng-6.0.3"

This reverts commit 84da988.

Author: uhafner

pom.xml

@@ -12,7 +12,7 @@
   <artifactId>warnings-ng</artifactId>
   <packaging>hpi</packaging>
   <name>Warnings Next Generation Plugin</name>
-  <version>6.0.3</version>
+  <version>6.0.3-SNAPSHOT</version>
   <url>https://wiki.jenkins.io/x/1YTeCQ</url>
   <description>Jenkins Warnings Next Generation plugin collects compiler warnings or issues reported by static
     analysis tools and visualizes the results. It has built-in support for numerous static analysis tools
@@ -1002,7 +1002,7 @@
     <connection>scm:git:git://github.com/jenkinsci/${project.artifactId}-plugin.git</connection>
     <developerConnection>scm:git:git@github.com:jenkinsci/${project.artifactId}-plugin.git</developerConnection>
     <url>https://github.com/jenkinsci/${project.artifactId}-plugin</url>
-    <tag>warnings-ng-6.0.3</tag>
+    <tag>HEAD</tag>
   </scm>
 
   <repositories>