TBR: Remove dependency on crypto, since that adds about 1M.
TBR: Remove dependency on crypto, since that adds about 1M.

Change-Id: I30bfb3c33445bf36cbf23adcc748fd4b324dc92e

viksit/chat,vanadium/chat,vanadium/chat,vanadium/chat,vanadium/chat,viksit/chat,viksit/chat,viksit/chat,vanadium/chat,viksit/chat