Remove 50selinuxrelabel

We are now using a new sepolicy where this is no longer needed,
remove it

Change-Id: Ibbb216d497a1d5774171399fc46cbc31d3999d39

Conflicts:

	configs/common.mk
	prebuilt/common/etc/init.d/50selinuxrelabel
cm: sepolicy: Allow ueventd to properly handle cpufreq changes

 * We need to allow relabeling since these files can pop in and out if
   the governor is changed.

Change-Id: Id75099290e24dac9962d4fed8148ec2df9e256b2
cm: sepolicy: Allow ueventd to load WiFi and audio irmware

 * Every device which uses Prima or WCD will hit this, so just allow it.

Change-Id: Ie2303ad7fc3498276d41e567a738cd016f635453