Remove unnecessary files

git-svn-id: https://plugins.svn.wordpress.org/wp-piwik/trunk@934746 b8457f37-d9ea-0310-8a92-e5e31aec5664
Remove unnecessary files

git-svn-id: https://plugins.svn.wordpress.org/wp-piwik/trunk@934747 b8457f37-d9ea-0310-8a92-e5e31aec5664
Remove unnecessary files

git-svn-id: https://plugins.svn.wordpress.org/wp-piwik/trunk@934748 b8457f37-d9ea-0310-8a92-e5e31aec5664