Remove volte_feature_disabled as carrier config handled it.
Remove volte_feature_disabled as carrier config handled it.

Bug: b/22602876
Change-Id: Ib1948c93eae6b563846563f1353bab24c4c687a0

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base