Remove update scripts for VTS makefiles.

These are automatically included as part of hidl_interface and no
longer need to be checked in.

Bug: 117348839
Test: manual
Change-Id: If07460e1b88c5929e23256c30ddb332ee64e9c3d
Merged-In: If07460e1b88c5929e23256c30ddb332ee64e9c3d