Fixes #732 Modlog, $lang->post not defined

#732 master
Revert "Fixes #732 Modlog, $lang->post not defined"

This reverts commit 4b602fd13e858736c2eda0ec64def3cf3164c2c5.
Fixes #732 Modlog, $lang->post not defined

$lang->post doesn't need to be defined anymore as it's not used (took
out the block where it was used because it would only run in a certain
situation, in which it would be incorrect so we just erase this)
Removes blocks where $lang->post would be used
Removing posts left join
Removes left join posts from ACP
Merge pull request #1075 from PirataNervo/fix-732

Fixes #732 Modlog, $lang->post not defined