Remove Latvian translations

git-svn-id: https://plugins.svn.wordpress.org/automatic-post-scheduler/trunk@851394 b8457f37-d9ea-0310-8a92-e5e31aec5664
Add LV translation

git-svn-id: https://plugins.svn.wordpress.org/automatic-post-scheduler/trunk@851396 b8457f37-d9ea-0310-8a92-e5e31aec5664