Style: Replace header guards with #pragma once

core/math/vector3.h

@@ -28,8 +28,7 @@
 /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
 /**************************************************************************/
 
-#ifndef VECTOR3_H
-#define VECTOR3_H
+#pragma once
 
 #include "core/error/error_macros.h"
 #include "core/math/math_funcs.h"
@@ -549,5 +548,3 @@ Vector3 Vector3::reflect(const Vector3 &p_normal) const {
 #endif
 	return 2.0f * p_normal * dot(p_normal) - *this;
 }
-
-#endif // VECTOR3_H