Kill AOSP branches and leave kk-4.4 as AOSP

kk-4.4-caf are caf branches
kk-4.4 branches are normal/aosp branches

Change-Id: If382c8a1a5c39271c56e240e29aacfc73fa50735
Signed-off-by: Chintan Shah <cgintan1998@gmail.com>