1. Open the Team on Teams panel that you intend to remove the Web Part;

  2. Click on the Settings button.

    settings_delete.png

  3. On the web part sidebar and click the Manage Maps icon;

    manage_maps.png

  4. The list of Marker will appear. Click the trash icon to delete the Marker;

    delete_map.png

  5. A message will appear requesting your confirmation. Click Ok and the web part will refresh and the Marker will be removed.