cm: Remove legacy compcache stuff

 * Remove all this stuff.  If a device wants ZRAM, it should be
   enabled by the maintainer and properly configured and tuned.
 * This stuff currently causes a conflict with the ZRAM support
   added in Kitkat. Kill it.

Change-Id: Ib2488ea4463e32ec44b65fe786f732145b5b6e23
merge fix

Change-Id: I2b3070898f4e3002db09ffa0d949c381bd4aa8c1