Fix #113013: Make in_out socket property read-only and remove the button

Pull Request: https://projects.blender.org/blender/blender/pulls/113048

scripts/startup/bl_ui/space_node.py

@@ -937,7 +937,6 @@ class NODE_PT_node_tree_interface(Panel):
             if active_item.item_type == 'SOCKET':
                 layout.prop(active_item, "socket_type", text="Type")
                 layout.prop(active_item, "description")
-                layout.prop(active_item, "in_out", text="Input/Output")
                 # Display descriptions only for Geometry Nodes, since it's only used in the modifier panel.
                 if tree.type == 'GEOMETRY':
                     field_socket_types = {