remove unused variables from Raycaster.

src/core/Raycaster.js

@@ -34,8 +34,6 @@
 
 	};
 
-	var v0 = new THREE.Vector3(), v1 = new THREE.Vector3(), v2 = new THREE.Vector3();
-
 	// http://www.blackpawn.com/texts/pointinpoly/default.html
 
 	var intersectObject = function ( object, raycaster, intersects ) {