std_limits.h (__glibcpp_f32_round_error, [...]): Kill.

	* include/std/std_limits.h (__glibcpp_f32_round_error,
	__glibcpp_f64_round_error, __glibcpp_f80_round_error,
	__glibcpp_f96_round_error, __glibcpp_f128_round_error,
	__glibcpp_float_round_error, __glibcpp_double_round_error,
	__glibcpp_long_double_round_error, __glibcpp_float_round_style,
	__glibcpp_double_round_style, __glibcpp_long_double_round_style): Kill.
	(numeric_limits<char>::epsilon, round_error): Use constant 0.
	(numeric_limits<float>::round_error): Use constant 0.5.
	(numeric_limits<float>::round_style): Use round_to_nearest.
	(numeric_limits<double>, numeric_limits<long double>): Similarly.

From-SVN: r57412