XWIKI-10545: Use the snapshots extension repository by default for snapshot builds

- Removed the previous implementation, since it was causing problems for tests that must run fully offline

xwiki-platform-tools/xwiki-platform-tool-configuration-resources/src/main/resources/xwiki.properties.vm

@@ -465,15 +465,6 @@ rendering.transformations = $xwikiRenderingTransformations
 #-# 
 #-# To not have any repository enabled (including disabling default repositories) you can explicitly make this list empty:
 # extension.repositories=
-## If this is a development build (snapshot), then make sure to include the XWiki Maven Snapshot Repository by
-## default for easier testing and development. Released builds will not have this and will use the above default values.
-#if ($project.version.endsWith('-SNAPSHOT'))
-#-#
-#-# Note: This is a development build. Using the XWiki Maven Snapshot Repository by default.
-extension.repositories=maven-xwiki-snapshot:maven:http://nexus.xwiki.org/nexus/content/groups/public-snapshots
-extension.repositories=maven-xwiki:maven:http://nexus.xwiki.org/nexus/content/groups/public
-extension.repositories=extensions.xwiki.org:xwiki:http://extensions.xwiki.org/xwiki/rest/
-#end
 
 #-# [Since 2.5]
 #-# The directory where extensions are stored after being downloaded.