Revert "Compiler changes for bitstring based type checks."

Bug: 64692057
Bug: 71853552
Bug: 26687569

This reverts commit eb0ebed72432b3c6b8c7b38f8937d7ba736f4567.

Change-Id: I7daeaa077960ba41b2ed42bc47f17501621be4be
45 files changed