cc3200: Remove util/std.h, can just use stdio.h instead.

cc3200/fatfs/src/drivers/sflash_diskio.c

 #include <stdint.h>
 #include <stdbool.h>
-#include "std.h"
+#include <stdio.h>
 
 #include "py/mpconfig.h"
 #include "py/obj.h"

cc3200/ftp/ftp.c

@@ -25,8 +25,7 @@
  */
 
 #include <stdint.h>
-#include <ctype.h>
-#include "std.h"
+#include <stdio.h>
 
 #include "py/mpstate.h"
 #include "py/obj.h"

cc3200/misc/mpirq.c

@@ -24,7 +24,7 @@
  * THE SOFTWARE.
  */
 
-#include "std.h"
+#include <stdio.h>
 
 #include "py/mpconfig.h"
 #include "py/obj.h"

cc3200/mods/modwlan.c

@@ -26,7 +26,7 @@
 
 #include <stdint.h>
 #include <stdbool.h>
-#include "std.h"
+#include <stdio.h>
 
 #include "simplelink.h"
 #include "py/mpconfig.h"

cc3200/util/std.h

-/*
- * This file is part of the Micro Python project, http://micropython.org/
- *
- * The MIT License (MIT)
- *
- * Copyright (c) 2013, 2014 Damien P. George
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
-// This file is needed because in some cases we can't include stdio.h,
-// because the CC3100 socket driver has name clashes with it.
-
-typedef unsigned int size_t;
-
-int printf(const char *fmt, ...);
-int snprintf(char *str, size_t size, const char *fmt, ...);