sh-common.c: Remove SH5 support.

gcc/
	* common/config/sh/sh-common.c: Remove SH5 support.
	* config/sh/constraints.md: Likewise.
	* config/sh/config/sh/elf.h: Likewise.
	* config/sh/linux.h: Likewise.
	* config/sh/netbsd-elf.h: Likewise.
	* config/sh/predicates.md: Likewise.
	* config/sh/sh-c.c: Likewise.
	* config/sh/sh-protos.h: Likewise.
	* config/sh/sh.c: Likewise.
	* config/sh/sh.h: Likewise.
	* config/sh/sh.md: Likewise.
	* config/sh/sh.opt: Likewise.
	* config/sh/sync.md: Likewise.
	* config/sh/sh64.h: Delete.
	* config/sh/shmedia.h: Likewise.
	* config/sh/shmedia.md: Likewise.
	* config/sh/sshmedia.h: Likewise.
	* config/sh/t-netbsd-sh5-64: Likewise.
	* config/sh/t-sh64: Likewise.
	* config/sh/ushmedia.h: Likewise.

From-SVN: r235544