[python] Remove un-necessary dependencies.

Change-Id: Ib3542c364ae8f670372cc848f6b59d7c7364817d

python/port/port.cpp

@@ -1,10 +1,7 @@
-#include <apps/i18n.h>
-#include <escher/metric.h>
-#include <ion/display.h>
-#include <ion/events.h>
-#include <ion/keyboard.h>
 #include "port.h"
 
+#include <ion/keyboard.h>
+
 #include <stdint.h>
 #include <string.h>
 #include <setjmp.h>

python/port/port.h

@@ -1,6 +1,8 @@
 #ifndef PYTHON_PORT_H
 #define PYTHON_PORT_H
 
+#include <stddef.h>
+
 namespace MicroPython {
 
 class ScriptProvider {