Revert "base: audiofx: harden against offload effects"

This reverts commit f8023fb48a6d34908334529cb39e9e311f3fd1e7.
Revert "[3/3] AudioEffect: Add a stereo widener effect"

This reverts commit 32decaa0af6103488670c342995713f411f9e2be.
Revert "[3/3] AudioFX: Add center frequency param to bassboost"

This reverts commit 438ee06c98ccb66c146e66aea91fa88c99c16dd4.