0.6.12.31:

0.6.12.31:
	finished getting rid of %PRIMITIVE SB!C:BYTE-BLT in favor of
		SB!KERNEL:%BYTE-BLT
	Now there are no primitive translators, so everything
		"grep -i primitive.translator" can go away.
	deleted not-much-use stuff related to %SP-STRING-SEARCH,
		%SP-FIND-CHARACTER, and %SP-REVERSE-FIND-CHARACTER
	deleted unused %SP-SKIP-CHARACTER, %SP-REVERSE-SKIP-CHARACTER,
		and MAYBE-SAP-MAYBE-STRING