[binutils-gdb] Remove free_all_values

[sergiodj+buildbot@sergiodj.net]

*** TEST RESULTS FOR COMMIT b562120198d9fa2c191823508813daa3b62a3a37 ***

Author: Tom Tromey <tom@tromey.com>
Branch: master
Commit: b562120198d9fa2c191823508813daa3b62a3a37

Remove free_all_values

free_all_values is unused, so this removes it.

gdb/ChangeLog
2018-04-06  Tom Tromey  <tom@tromey.com>

	* value.h (free_all_values): Remove.
	* value.c (free_all_values): Remove.