Update WebGLProgram.html

docs/api/renderers/webgl/WebGLProgram.html

@@ -40,7 +40,6 @@
 		attribute vec3 position;
 		attribute vec3 normal;
 		attribute vec2 uv;
-		attribute vec2 uv2;
 		</code>
 		<p>
 		Note that you can therefore calculate the position of a vertex in the vertex shader by: