WebGLRenderer: Remove useless line from initMaterial().

src/renderers/WebGLRenderer.js

@@ -1323,8 +1323,6 @@ function WebGLRenderer( parameters ) {
 
 		} else if ( materialProperties.lightsStateVersion !== lightsStateVersion ) {
 
-			materialProperties.lightsStateVersion = lightsStateVersion;
-
 			programChange = false;
 
 		} else if ( parameters.shaderID !== undefined ) {