Remove unused handover code.

Remove unused hidden handover code.

These extras are not used anywhere.  Removing them and the associated
code.

Flag: Code cleanup only; no functional impact since this is orphaned code.
Test: Compile code to verify no build errors.
Bug: 308003610
Change-Id: I59bc7fefcdf7d2c9f40c06b0a1a44809db055067