Cleanup: redundant check for shader type

Pull Request: https://projects.blender.org/blender/blender/pulls/143784

intern/cycles/blender/addon/ui.py

@@ -1456,7 +1456,7 @@ class CYCLES_OBJECT_PT_visibility_culling(CyclesButtonsPanel, Panel):
 def panel_node_draw(layout, id_data, output_type, input_name):
     from bpy_extras.node_utils import find_node_input
 
-    if not isinstance(id_data, bpy.types.World) and not id_data.use_nodes:
+    if output_type != 'OUTPUT_WORLD' and not id_data.use_nodes:
         layout.operator("cycles.use_shading_nodes", icon='NODETREE')
         return False