Revert "lowmemorykiller: Imported the new LMK from 3.4 kernel"

This reverts commit ce9a37ee6abdb13cfc55995fa5136eaa5d9ec219.
Revert "lowmemorykiller: Optimize some values and code"

This reverts commit b0ba0c0d95b160055602d3eb0262ed9698ce1417.
Revert "lowmemorykiller: Fixed errors and warnings"

This reverts commit a5e964988b8997905462d7a0f02d223ade364278.
Revert "staging: android: lowmemorykiller: Management of not killable processes"

This reverts commit 560fe2a5f4c4d238b7ce3f0391e8094419740f1f.