[binutils-gdb] Remove regcache_xfree

[sergiodj+buildbot@sergiodj.net]

*** TEST RESULTS FOR COMMIT c0e383c63818baee1daf51b8fb1bae34d1e0597f ***

Author: Tom Tromey <tom@tromey.com>
Branch: master
Commit: c0e383c63818baee1daf51b8fb1bae34d1e0597f

Remove regcache_xfree

This removes regcache_xfree in favor of plain "delete".

gdb/ChangeLog
2017-09-25  Tom Tromey  <tom@tromey.com>

	* spu-tdep.c (spu2ppu_dealloc_cache): Use delete.
	* regcache.h (regcache_xfree): Don't declare.
	* regcache.c (regcache_xfree): Remove.
	(do_regcache_xfree): Use delete.
	* ppc-linux-tdep.c (ppu2spu_dealloc_cache): Use delete.
	* linux-fork.c (free_fork): Use delete.
	(fork_save_infrun_state): Likewise.
	* jit.c (jit_dealloc_cache): Use delete.
	* infrun.c (discard_infcall_suspend_state): Use delete.