Revert "BoardConfig: Enable TARGET_USES_OVERLAY"

This reverts commit b99356805197d0e902f07af14c1b159706ba092c.

I was scammed, this is a no-op.
HammerHead : Add proximity wake flag

Change-Id: I78e677b20a03977d8180726dc64283658ce9c5f9
Revert "BoardConfig: Use AOSP QCOM power HAL"

This reverts commit 3d4eea94228dbd6b3822427cb364529707223477.
BoardConfig: Remove TARGET_USES_CPU_BOOST_HINT

This is a no-op.