We don't actually have a stdio.h header file. Our printf() functions are

defined in vsprintf.h.  (This may change, since vsprintf.h is a
non-standard name, but for now it's the one to use.)

There should be no need to include vsprintf.h just for DBG() statements,
since include/compiler.h forces it in for a debug build anyway.

src/net/arp.c

@@ -16,7 +16,6 @@
  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include "stdio.h"
 #include <stdint.h>
 #include <string.h>
 #include <byteswap.h>

src/net/icmpv6.c

@@ -1,4 +1,3 @@
-#include <stdio.h>
 #include <stdint.h>
 #include <string.h>
 #include <byteswap.h>

src/net/ndp.c

@@ -1,4 +1,3 @@
-#include "stdio.h"
 #include <stdint.h>
 #include <string.h>
 #include <byteswap.h>

src/net/netdevice.c

@@ -16,7 +16,6 @@
  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include <stdio.h>
 #include <stdint.h>
 #include <byteswap.h>
 #include <string.h>

src/net/retry.c

@@ -16,7 +16,6 @@
  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include <stdio.h>
 #include <stddef.h>
 #include <latch.h>
 #include <gpxe/list.h>

src/net/tcpip.c

@@ -1,4 +1,3 @@
-#include <stdio.h>
 #include <stdint.h>
 #include <string.h>
 #include <errno.h>

src/net/udp.c

@@ -1,4 +1,3 @@
-#include <stdio.h>
 #include <stdint.h>
 #include <string.h>
 #include <assert.h>

src/net/udp/dhcp.c

@@ -16,7 +16,6 @@
  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include <stdio.h>
 #include <string.h>
 #include <errno.h>
 #include <assert.h>

src/net/uip/uip.c

@@ -168,7 +168,6 @@ struct uip_stats uip_stat;
 #endif /* UIP_STATISTICS == 1 */
 
 #if UIP_LOGGING == 1
-#include <stdio.h>
 void uip_log(char *msg);
 #define UIP_LOG(m) uip_log(m)
 #else