WebGLShadowMap: Removed unused code.

src/renderers/webgl/WebGLShadowMap.js

@@ -61,8 +61,6 @@ THREE.WebGLShadowMap = function ( _renderer, _lights, _objects ) {
 			skinning: useSkinning
 		} );
 
-		depthMaterial._shadowPass = true;
-
 		_depthMaterials[ i ] = depthMaterial;
 
 		var distanceMaterial = new THREE.ShaderMaterial( {
@@ -73,8 +71,6 @@ THREE.WebGLShadowMap = function ( _renderer, _lights, _objects ) {
 			skinning: useSkinning
 		} );
 
-		distanceMaterial._shadowPass = true;
-
 		_distanceMaterials[ i ] = distanceMaterial;
 
 	}