Remove leftovers of the old-style locks.

At this point, none of these functions or macros are used so they can
just be deleted.

Change-Id: I8ed1aae7a252e886864bf43e3096eff2228183cd
Reviewed-on: https://boringssl-review.googlesource.com/4777
Reviewed-by: Adam Langley <agl@google.com>
2 files changed