worldpos_vertex: avoid unneeded includes

src/renderers/shaders/ShaderChunk/worldpos_vertex.glsl

@@ -1,4 +1,4 @@
-#if defined( USE_ENVMAP ) || defined( PHONG ) || defined( PHYSICAL ) || defined( LAMBERT ) || defined( DISTANCE ) || defined ( USE_SHADOWMAP )
+#if defined( USE_ENVMAP ) || defined( DISTANCE ) || defined ( USE_SHADOWMAP )
 
 	vec4 worldPosition = modelMatrix * vec4( transformed, 1.0 );