HTCQualcommM7CDMARIL: remove skip subscription hack

With the availability of setting a default subscription source via
ro.telephony.default_cdma_sub ( http://review.cyanogenmod.org/54501 ),
this hack should no longer be necessary. Only m7vzw should be affected
by this commit.

Change-Id: I4f7ff17176e08f2d1f07d0c245033742c72ebff5