remove releasetools extensions

Depends-on: Ic348d31e8df7933dc4f9f055b7a5a2beacc21d32
http://review.cyanogenmod.org/36813

Change-Id: I8cb79d1eaa61caa738f39b50d143dba46ff9610f
Merge "remove releasetools extensions" into jb-mr1