timeout,top,watch,ping: parse NN.N fractional duration in locales with other separators

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

coreutils/sleep.c

@@ -74,10 +74,6 @@ int sleep_main(int argc UNUSED_PARAM, char **argv)
 			sleep(INT_MAX);
 
 #if ENABLE_FEATURE_FANCY_SLEEP
-# if ENABLE_FLOAT_DURATION
-	/* undo busybox.c setlocale */
-	setlocale(LC_NUMERIC, "C");
-# endif
 	duration = 0;
 	do {
 		duration += parse_duration_str(*argv);