Revert "audio_effects: Add stereowide effect"

not needed for CM's DSP

This reverts commit b75767df9f5b5569c0f3469c4936a62848533b39.

Change-Id: I7b5c47b1f11423e87e517868a55fc2b7de5ccda6
hammerhead: Make proximity check opt-in

This function's behavior is annoying and can even be
a deal-breaker for new or undiscerning CM users.

Change-Id: I51e43fd2adeaab79e74541fafadac95e16b267ff
hammerhead: Disable interactive sync feature

Change-Id: Ic2cef92fa48bc8822dffb7199895ff24cb8bc0ec
hammerhead: Set volume last to avoid pops on speaker

Change-Id: I11b3d3c41f014628ac5899d3a3bfea1b7937d7bc
hammerhead: lcd_kcal: remove control bit

Change-Id: Iba8dfd157406bbdeb0421e30c7dc495a0d377d0c