mapeditor: use vcmi_endian.h

There is no need to redefine this functions, let's use shared
implementation

mapeditor/Animation.cpp

@@ -15,6 +15,7 @@
 
 #include "BitmapHandler.h"
 
+#include "../lib/vcmi_endian.h"
 #include "../lib/filesystem/Filesystem.h"
 #include "../lib/filesystem/ISimpleResourceLoader.h"
 #include "../lib/JsonNode.h"

mapeditor/BitmapHandler.cpp

@@ -14,6 +14,7 @@
 #include "BitmapHandler.h"
 
 #include "../lib/filesystem/Filesystem.h"
+#include "../lib/vcmi_endian.h"
 
 #include <QBitmap>
 #include <QImage>

mapeditor/BitmapHandler.h

@@ -8,10 +8,6 @@
  *
  */
 #pragma once
-//code is copied from vcmiclient/CBitmapHandler.h with minimal changes
-
-#define read_le_u16(p) (* reinterpret_cast<const ui16 *>(p))
-#define read_le_u32(p) (* reinterpret_cast<const ui32 *>(p))
 
 #include <QImage>