WebXRManager: Remove redundant `updateMatrixWorld` calls (#26201)

Co-authored-by: Noeri Huisman <[email protected]>

src/renderers/webxr/WebXRManager.js

@@ -571,14 +571,6 @@ class WebXRManager extends EventDispatcher {
 			camera.matrix.decompose( camera.position, camera.quaternion, camera.scale );
 			camera.updateMatrixWorld( true );
 
-			const children = camera.children;
-
-			for ( let i = 0, l = children.length; i < l; i ++ ) {
-
-				children[ i ].updateMatrixWorld( true );
-
-			}
-
 			camera.projectionMatrix.copy( cameraXR.projectionMatrix );
 			camera.projectionMatrixInverse.copy( cameraXR.projectionMatrixInverse );