Remove unnecessary includes in dtoa.c

Author: past-due

dtoa.c

@@ -28,9 +28,9 @@
 #include <string.h>
 #include <assert.h>
 #include <ctype.h>
-#include <sys/time.h>
+// #include <sys/time.h>
 #include <math.h>
-#include <setjmp.h>
+// #include <setjmp.h>
 
 #include "cutils.h"
 #include "dtoa.h"