noosfero | Image destroy (#479)

[Bráulio Bhavamitra]

New comment for Merge Request 479

https://gitlab.com/noosfero/noosfero/merge_requests/479#note_905616


Bráulio Bhavamitra

@diguliu there are several `acts_as_having_image` usages and other usages with `image_id`

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