sm8350-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

vendor.prop

@@ -133,7 +133,6 @@ bluetooth.profile.pan.nap.enabled?=true
 bluetooth.profile.pan.panu.enabled?=true
 bluetooth.profile.pbap.server.enabled?=true
 bluetooth.profile.sap.server.enabled?=true
-persist.bluetooth.a2dp_offload.cap=sbc-aac-aptx-aptxhd-ldac-lhdc
 persist.bluetooth.a2dp_offload.disabled=false
 persist.vendor.bt.aac_frm_ctl.enabled=true
 persist.vendor.bt.aac_vbr_frm_ctl.enabled=true