diff --git a/src/renderers/WebGLRenderer.js b/src/renderers/WebGLRenderer.js
index fc9c80e93aa843611af970c4ca7340c80256894f..e2496f7c75e31642ed1b0c8a8ba994ee01478841 100644
--- a/src/renderers/WebGLRenderer.js
+++ b/src/renderers/WebGLRenderer.js
@@ -1488,12 +1488,6 @@ THREE.WebGLRenderer = function ( parameters ) {
 
 	}
 
-	function numericalSort ( a, b ) {
-
-		return b[ 0 ] - a[ 0 ];
-
-	}
-
 	// Rendering
 
 	this.render = function ( scene, camera, renderTarget, forceClear ) {