testsuite, rs6000: Remove all linux*paired* checks and cases

testsuite, rs6000: Remove all linux*paired* checks and cases

Since r9-115-g559289370f76bf the support of paired single
had been dropped, but we still have some test checks and
cases for that, this patch is to get rid of them.

gcc/testsuite/ChangeLog:

	* lib/target-supports.exp (check_effective_target_vect_int): Remove
	the check on powerpc-*-linux*paired*.
	(check_effective_target_vect_intfloat_cvt): Likewise.
	(check_effective_target_vect_uintfloat_cvt): Likewise.
	(check_effective_target_vect_floatint_cvt): Likewise.
	(check_effective_target_vect_floatuint_cvt): Likewise.
	(check_effective_target_powerpc_altivec_ok): Likewise.
	(check_effective_target_powerpc_p9modulo_ok): Likewise.
	(check_effective_target_powerpc_float128_sw_ok): Likewise.
	(check_effective_target_powerpc_float128_hw_ok): Likewise.
	(check_effective_target_powerpc_vsx_ok): Likewise.
	(check_effective_target_powerpc_htm_ok): Likewise.
	(check_effective_target_vect_shift): Likewise.
	(check_effective_target_vect_char_add): Likewise.
	(check_effective_target_vect_shift_char): Likewise.
	(check_effective_target_vect_long): Likewise.
	(check_effective_target_ifn_copysign): Likewise.
	(check_effective_target_vect_sdot_hi): Likewise.
	(check_effective_target_vect_udot_hi): Likewise.
	(check_effective_target_vect_pack_trunc): Likewise.
	(check_effective_target_vect_int_mult): Likewise.
	* gcc.target/powerpc/paired-1.c: Remove.
	* gcc.target/powerpc/paired-10.c: Remove.
	* gcc.target/powerpc/paired-2.c: Remove.
	* gcc.target/powerpc/paired-3.c: Remove.
	* gcc.target/powerpc/paired-4.c: Remove.
	* gcc.target/powerpc/paired-5.c: Remove.
	* gcc.target/powerpc/paired-6.c: Remove.
	* gcc.target/powerpc/paired-7.c: Remove.
	* gcc.target/powerpc/paired-8.c: Remove.
	* gcc.target/powerpc/paired-9.c: Remove.
	* gcc.target/powerpc/ppc-paired.c: Remove.