Revert "Handle LTO like how AOSP handles FDO."

This reverts commit a861063c8257efcbfa9a063df9b7cae7d675f29e.
Revert "This is not the flag you are looking for..."

This reverts commit 2592d7aec59133d725d480a61d00f4e436eb54bd.
Revert "And so begins the LTO experiment..."

This reverts commit c8bc776c4018932235c193eaae0636469570f5a9.