fold-const.cc: remove strict_overflow_p from maybe_canonicalize_comparison

Remove the strict overflow flag from maybe_canonicalize_comparison
functions. All related fold_overflow_warning calls are also removed.

gcc/ChangeLog:

	* fold-const.cc (maybe_canonicalize_comparison_1): Removed
	strict_overflow_p flag.
	(maybe_canonicalize_comparison): Removed strict_overflow_p
	flag and all fold_overflow_warning calls.
1 file changed