Revert "zswap, frontswap, vnswap: extract and backport to Nexus series"

This reverts commit 61f23533f934f77868b566f1d4c91e96ed064ba0.
Revert "defconfig: enable zram, zswap, vnswap, frontswap, etc..."

This reverts commit 51694bdd864fc431cc42b58dd552d8678fbb0d7c.

Conflicts:
	arch/arm/configs/cm_rhine_honami_row_defconfig

Change-Id: I12f863b6f3d0eed13ae54893471afbdb680e98f8