instruction: I want to delete the unnecessary screenshot images from the Gallery app.

previous_actions: 

active_application: Gallery

screen_description: windows {
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    bottom: 128
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  layer: 1
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      content_description: "11:59 PM"
      text: "11:59"
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      content_description: "Battery charging, 100 percent."
      depth: 7
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      content_description: "Wifi signal full."
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      content_description: "Plantum notification: Chinese evergreens: Watering"
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      content_description: "Weather&Radar notification: Share your Joy! "
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      content_description: "Google News notification: CBS News"
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}
windows {
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  id: 10173
  title: "Gallery"
  window_type: TYPE_APPLICATION
  is_active: true
  is_focused: true
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      depth: 3
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      depth: 4
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      content_description: "Photo taken on Sep 22, 2023 4:46:02 PM."
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}


assistant: !FUNCTIONCALL{"name": "navigate_back", "parameters": {}}