hercules: Gallery2 overlay is no longer used

Change-Id: I9e393fa9fe2602966ea210de88666bed035c46c5
skyrocket: Gallery2 overlay is no longer used

Change-Id: I89c2971a3566a1e2619ff56810aed0954c474b3d
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_device_samsung_skyrocket into cm-11.0
Merge branch 'cm-11.0' of github.com:CyanogenMod/android_device_samsung_hercules into HEAD
Merge branch 'cm-11.0' of https://github.com/kbc-developers/android_device_samsung_celoxdcm into test-twrp