Clean up.

src/renderers/webvr/WebVRUtils.js

@@ -30,9 +30,7 @@ function setProjectionFromUnion( camera, cameraL, cameraR ) {
 	var near = projL[ 14 ] / ( projL[ 10 ] - 1 );
 	var far = projL[ 14 ] / ( projL[ 10 ] + 1 );
 	var topFov = ( projL[ 9 ] + 1 ) / projL[ 5 ];
-	var bottomFov  = ( projL[ 9 ] - 1 ) / projL[ 5 ];
-	var top = near * topFov;
-	var bottom = near * bottomFov;
+	var bottomFov = ( projL[ 9 ] - 1 ) / projL[ 5 ];
 
 	var leftFov = ( projL[ 8 ] - 1 ) / projL[ 0 ];
 	var rightFov = ( projR[ 8 ] + 1 ) / projR[ 0 ];