maguro: remove duplicate overlay

Already defined in vendor/cm

Change-Id: I887a3051884b29ba9aaecb370e8ab6d5020165cf
tuna: commonize what we can (2/4)

Change-Id: I9b38185aea5b7ebe9abed55dcb5b42927e43c36b
Merge remote-tracking branch 'upstream/cm-11.0' into cm-11.0