lights_phong_fragment: METAL has been removed.

src/renderers/shaders/ShaderChunk/lights_phong_fragment.glsl

@@ -3,9 +3,3 @@ material.diffuseColor = diffuseColor.rgb;
 material.specularColor = specular;
 material.specularShininess = shininess;
 material.specularStrength = specularStrength;
-
-#ifdef METAL
-
-	material.diffuseColor = vec3( 0.0 );
-
-#endif