Removing @removed methods and constants

Several methods, plus a few hashmaps,
helper classes, and some constants
existed for an early builds
of NYC, and were marked @removed, and are
here finally removed.

Bug: 28208055
Change-Id: If650d83c0dc573e922342d09360ecf9a5bb0c98a
Fixes: 28208055
Test: GMaps, AndroiTS GPS Test, GnssLogger & CtsVerifier
      All run fine on a Pixel