sm8450-common: Remove unused persist.bluetooth.a2dp_offload.cap property

This prop has no effect as of T QPR1.

See: LineageOS/android_packages_modules_Bluetooth@cf25e33

Change-Id: Ic762812dd59429d344ccc55c01bf96b0ffd6dbab

properties/vendor.prop

@@ -167,7 +167,6 @@ vendor.voice.path.for.pcm.voip=true
 persist.vendor.battery.health=true
 
 # Bluetooth
-persist.bluetooth.a2dp_offload.cap=sbc-aac-aptx-aptxhd-ldac
 persist.bluetooth.a2dp_offload.disabled=false
 persist.sys.fflag.override.settings_bluetooth_hearing_aid=true
 persist.vendor.bt.a2dp_offload_cap=sbc-aac-aptx-aptxhd-ldac