code: def test_ddro001_remove_option_single(dash_dcc):
      dropdown_options = sample_dropdown_options
  
      app = Dash(__name__)
      value = "SF"
  
      app.layout = html.Div(
          [
              dcc.Dropdown(
                  options=dropdown_options,
                  value=value,
                  searchable=False,
                  id="dropdown",
              ),
              html.Button("Remove option", id="remove"),
              html.Div(id="value-output"),
          ]
      )
  
      @app.callback(
          Output("dropdown", "options"), [Input("remove", "n_clicks")]
      )
      def on_click(n_clicks):
          if not n_clicks:
              raise PreventUpdate
          return sample_dropdown_options[:-1]
  
      @app.callback(
          Output("value-output", "children"),
          [Input("dropdown", "value")],
      )
      def on_change(val):
          if not val:
              raise PreventUpdate
          return val or "None"
  
      dash_dcc.start_server(app)
      btn = dash_dcc.wait_for_element("#remove")
      btn.click()
  
      dash_dcc.wait_for_text_to_equal("#value-output", "None")
  
imports: import json
  from dash import Dash, html, dcc, Output, Input
  from dash.exceptions import PreventUpdate
label_desc: Use image node_id 1 for calling a global function with example usage: test_ddro001_remove_option_single(dash_dcc) and returns: sample_dropdown_options, unknown