FP3: audio: remove VOIP_RX mono configuration

Fails in VTS for all provided sample rates.

Test: run vts -m VtsHalAudioV7_0TargetTest -t PcmOnlyConfigOutputStream/PcmOnlyConfigOutputStreamTest#PresentationPositionAdvancesWithWrites/369_default_primary_369__8000_AUDIO_CHANNEL_OUT_MONO___AUDIO_OUTPUT_FLAG_DIRECT__AUDIO_OUTPUT_FLAG_VOIP_RX__
Issue: FP3-A12#24
Change-Id: I7a3ae6428574c45e62b1d8bf4c9be32a54fab51e