Revert "TS-2483 Add to docs."

This reverts commit c89d14621e2fd7ef1350990960f5a33aa3ff06d1.
Revert "TS-2483 Add a new metric, proxy.node.restarts.proxy.cache_ready_time,"

This reverts commit 5df2cac3846d7d2f9ae255b051f748d25773a8bc.

Conflicts:
	CHANGES

This does not cooperate nicely with librecords. Might be bugs in
both librecords and here, but backing out for now.