System props: clean-up

ro.ril.def.agps.mode: Not used by CM
persist.gps.qmienabled: Already defined in msm8960-common
keyguard.no_require_sim: Already defined in full_base_telephony.mk
persist.radio.no_wait_for_card: Not used by CM

Change-Id: I61ba72e5894a59eec4cbbc1b1259ff4f784027c8