libbb: stop using bb_strtod for now

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

libbb/Kbuild

@@ -13,7 +13,7 @@ lib-y += bb_basename.o
 lib-y += bb_do_delay.o
 lib-y += bb_pwd.o
 lib-y += bb_qsort.o
-lib-y += bb_strtod.o
+#lib-y += bb_strtod.o
 lib-y += bb_strtonum.o
 lib-y += change_identity.o
 lib-y += chomp.o

libbb/bb_strtod.c

@@ -12,6 +12,7 @@
 
 #define NOT_DIGIT(a) (((unsigned char)(a-'0')) > 9)
 
+#if 0 // UNUSED
 double FAST_FUNC bb_strtod(const char *arg, char **endp)
 {
 	double v;
@@ -36,6 +37,7 @@ double FAST_FUNC bb_strtod(const char *arg, char **endp)
 	}
 	return v;
 }
+#endif
 
 #if 0
 /* String to timespec: "NNNN[.NNNNN]" -> struct timespec.