Revert "Add gsi car targets"

This reverts commit 3fc4dffa37634bd873d3f717fa92b0b67f00051c.

Reason for revert: <ag/14287581 is the CL that triggers the git_master test build breakage, per https://buganizer.corp.google.com/issues/186381337#comment2>

Change-Id: I1abdb20c66e4cb0b598822e8e5f77823acb3904c
4 files changed