Style: Replace header guards with #pragma once

modules/dds/texture_loader_dds.h

@@ -28,8 +28,7 @@
 /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
 /**************************************************************************/
 
-#ifndef TEXTURE_LOADER_DDS_H
-#define TEXTURE_LOADER_DDS_H
+#pragma once
 
 #include "core/io/resource_loader.h"
 
@@ -42,5 +41,3 @@ public:
 
 	virtual ~ResourceFormatDDS() {}
 };
-
-#endif // TEXTURE_LOADER_DDS_H