Removed unneeded code from buffergeometry example.

examples/webgl_buffergeometry.html

@@ -275,9 +275,6 @@
 
 			function onWindowResize() {
 
-				windowHalfX = window.innerWidth / 2;
-				windowHalfY = window.innerHeight / 2;
-
 				camera.aspect = window.innerWidth / window.innerHeight;
 				camera.updateProjectionMatrix();