C++ modernize: Pragma once (#6264)

* Migrate cpp headers to pragma once

src/client/clientlauncher.h

@@ -17,8 +17,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
-#ifndef __CLIENT_LAUNCHER_H__
-#define __CLIENT_LAUNCHER_H__
+#pragma once
 
 #include "irrlichttypes_extrabloated.h"
 #include "client/inputhandler.h"
@@ -69,5 +68,3 @@ protected:
 	std::string current_address = "does-not-exist";
 	int current_port = 0;
 };
-
-#endif

src/client/inputhandler.h

@@ -17,8 +17,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
-#ifndef INPUT_HANDLER_H
-#define INPUT_HANDLER_H
+#pragma once
 
 #include "irrlichttypes_extrabloated.h"
 #include "joystick_controller.h"
@@ -393,5 +392,3 @@ private:
 	bool leftreleased = false;
 	bool rightreleased = false;
 };
-
-#endif

src/client/joystick_controller.h

@@ -17,8 +17,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
-#ifndef JOYSTICK_HEADER
-#define JOYSTICK_HEADER
+#pragma once
 
 #include "irrlichttypes_extrabloated.h"
 #include "keys.h"
@@ -168,5 +167,3 @@ private:
 	std::bitset<KeyType::INTERNAL_ENUM_COUNT> m_past_pressed_keys;
 	std::bitset<KeyType::INTERNAL_ENUM_COUNT> m_past_released_keys;
 };
-
-#endif

src/client/keys.h

@@ -17,8 +17,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
-#ifndef KEYS_HEADER
-#define KEYS_HEADER
+#pragma once
 
 #include <list>
 
@@ -114,5 +113,3 @@ public:
 };
 
 typedef KeyType::T GameKeyType;
-
-#endif

src/client/tile.h

@@ -17,8 +17,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
-#ifndef TILE_HEADER
-#define TILE_HEADER
+#pragma once
 
 #include "irrlichttypes.h"
 #include "irr_v3d.h"
@@ -330,4 +329,3 @@ struct TileSpec
 	//! The first is base texture, the second is overlay.
 	TileLayer layers[MAX_TILE_LAYERS];
 };
-#endif