* opts.c (warning_as_error_callback,
	register_warning_as_error_callback): Remove.
	(enable_warning_as_error): Don't use warning_as_error_callback.
	* opts.h (register_warning_as_error_callback): Remove.

c-family:
	* c-opts.c (warning_as_error_callback): Remove.
	(c_common_initialize_diagnostics): Don't call
	register_warning_as_error_callback.
	(c_common_handle_option): Handle -Werror=normalized= here.

testsuite:
	* gcc.dg/cpp/warn-normalized-3.c: Update expected note text.

From-SVN: r166606