Remove obsoleted maint scripts in favor of requeueTranscodes.php
The new requeueTranscodes.php handles several cases better:
- has a --throttle option to avoid flooding queues
- handles cases where transcode table wasn't filled out right
- more flexible config options on one script
- should handle multiple overlapping cases better
Change-Id: I321d4869ac8ea187c2bbf0fbfc0ce0ad3a540630