Revert "qcom-common: Add releasetools for assertions"

tbh only did this because there was something wrong with my builds & I didn't
look at the source. Now that I've looked up WHY cm needed this, none of my d2
devices had non-kernel reboot problems for some time now on aokpx.

This reverts commit 9528e548249ba23152161f6b6f8db64baabb6c4c.
qcom-common: add common qcom ril class
qcom-common: Add RIL startup script for IPv6 tethering

Change-Id: I6c1fba6ea51451b218c5daae30ae0dc37838f7e0