arm: Remove unused variable arm_binop_none_none_unone_qualifiers

arm: Remove unused variable arm_binop_none_none_unone_qualifiers

Commits r12-7342 and r12-7344 made some cleanup, leaving
arm_binop_none_none_unone_qualifiers unused.
This is causing build failures with -Werror (eg bootstrap).

This patch fixes the problem by removing the definition of
arm_binop_none_none_unone_qualifiers and
BINOP_NONE_NONE_UNONE_QUALIFIERS which are now unused.

Tested by bootstraping on arm-linux-gnueaibhf.

2022-03-04  Christophe Lyon  <christophe.lyon@arm.com>

	gcc/
	* config/arm/arm-builtins.cc
	(arm_binop_none_none_unone_qualifiers): Delete.
	(BINOP_NONE_NONE_UNONE_QUALIFIERS): Delete.