rs6000: Remove rs6000-builtin.def and associated data and functions

2021-12-02  Bill Schmidt  <wschmidt@linux.ibm.com>

gcc/
	* config/rs6000/rs6000-builtin.def: Delete.
	* config/rs6000/rs6000-call.c (builtin_compatibility): Delete.
	(builtin_description): Delete.
	(builtin_hash_struct): Delete.
	(builtin_hasher): Delete.
	(builtin_hash_table): Delete.
	(builtin_hasher::hash): Delete.
	(builtin_hasher::equal): Delete.
	(rs6000_builtin_info_type): Delete.
	(rs6000_builtin_info): Delete.
	(bdesc_compat): Delete.
	(bdesc_3arg): Delete.
	(bdesc_4arg): Delete.
	(bdesc_dst): Delete.
	(bdesc_2arg): Delete.
	(bdesc_altivec_preds): Delete.
	(bdesc_abs): Delete.
	(bdesc_1arg): Delete.
	(bdesc_0arg): Delete.
	(bdesc_htm): Delete.
	(bdesc_mma): Delete.
	(rs6000_overloaded_builtin_p): Delete.
	(rs6000_overloaded_builtin_name): Delete.
	(htm_spr_num): Delete.
	(rs6000_builtin_is_supported_p): Delete.
	(rs6000_gimple_fold_mma_builtin): Delete.
	(gt-rs6000-call.h): Remove include directive.
	* config/rs6000/rs6000-protos.h (rs6000_overloaded_builtin_p): Delete.
	(rs6000_builtin_is_supported_p): Delete.
	(rs6000_overloaded_builtin_name): Delete.
	* config/rs6000/rs6000.c (rs6000_builtin_decls): Delete.
	(rs6000_debug_reg_global): Remove reference to RS6000_BUILTIN_COUNT.
	* config/rs6000/rs6000.h (rs6000_builtins): Delete.
	(altivec_builtin_types): Delete.
	(rs6000_builtin_decls): Delete.
	* config/rs6000/t-rs6000 (TM_H): Don't add rs6000-builtin.def.