Revert "Add MCC/MNC override for American Samoa." am: 74b50a6641 am: 5782b2b4ff

Original change: https://android-review.googlesource.com/c/platform/system/timezone/+/3223082

Change-Id: Ia88aeeb1b962243041750fd64277e2932bcb10dd
Signed-off-by: Automerger Merge Worker <[email protected]>