Remove CFI diagnostics mode

CFI diagnostics sould be disabled since it introduces additional
overhead/complexity, and the diagnostics libraries haven't been analyzed
from a security perspective since they were primarily meant for testing.
The CFI will still work.

Bug: 146408702
Bug: 149427927
Change-Id: I4afb84fc9d64439f6660c44343abefa62f9fedf4
5 files changed