Revert "Track libcore and art from CM"

This reverts commit 617fbc7c24b93ee6a83b19f15fbad12c2b077c35.
Track libcore and art from CM

Change-Id: I83e5d7cc66ca01129125a8ce8b997f9fe14e14bf
Signed-off-by: iceandfire <arhamjamal@gmail.com>
fixed derp

Change-Id: I6e6092d65328f5c7ffa90f4350e36a42497b09ef
Merge branch 'kitkat' of https://github.com/TeamHorizon/platform_manifest into kitkat
removed Tegra-Common

Change-Id: Id8168899d8b5deb9b3b7baec85c530cddcff0e39