code: def delete_dashboard(self, team_context, dashboard_id):
          
          project = None
          team = None
          if team_context is not None:
              if team_context.project_id:
                  project = team_context.project_id
              else:
                  project = team_context.project
              if team_context.team_id:
                  team = team_context.team_id
              else:
                  team = team_context.team
  
          route_values = {}
          if project is not None:
              route_values['project'] = self._serialize.url('project', project, 'string')
          if team is not None:
              route_values['team'] = self._serialize.url('team', team, 'string')
          if dashboard_id is not None:
              route_values['dashboardId'] = self._serialize.url('dashboard_id', dashboard_id, 'str')
          self._send(http_method='DELETE',
                     location_id='454b3e51-2e6e-48d4-ad81-978154089351',
                     version='5.0-preview.2',
                     route_values=route_values)
docs: DeleteDashboard.
          [Preview API] Delete a dashboard given its ID. This also deletes the widgets associated with this dashboard.
          :param :class:`<TeamContext> <azure.devops.v5_0.dashboard.models.TeamContext>` team_context: The team context for the operation
          :param str dashboard_id: ID of the dashboard to delete.