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void unregister_widget_control ( string name )
Removes a widget’s admin callback.
Widgets API: is_active_sidebar, register_sidebars, register_sidebar, unregister_sidebar, is_dynamic_sidebar, dynamic_sidebar, register_sidebar_widget, unregister_sidebar_widget, wp_register_sidebar_widget, wp_unregister_sidebar_widget, wp_get_sidebars_widgets, wp_set_sidebars_widgets, is_active_widget, the_widget, register_widget, unregister_widget, register_widget_control, unregister_widget_control, wp_register_widget_control, wp_unregister_widget_control, wp_convert_widget_settings, wp_get_widget_defaults, wp_widget_description