trunk: Removing egs/lre07/v2 and egs/lre07/v3, two LRE07 recipes that should not have been merged into trunk from the language_id sandbox.

git-svn-id: https://svn.code.sf.net/p/kaldi/code/trunk@4707 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8