Remove hook for EVENT_MENU_MANAGE
Remove hook for EVENT_MENU_MANAGE

This was added in 7a0992ab48c8a762b4fd27db6447f81433a8447e and caused a
regression, display of 'Array' under the manage menu items, and an array
to string conversion PHP system notice.

Fixes #175

dregad/source-integration,mantisbt-plugins/source-integration,make-all/source-integration,make-all/source-integration,make-all/source-integration,dregad/source-integration,mantisbt-plugins/source-integration,dregad/source-integration,mantisbt-plugins/source-integration