What do you mean Exactly?
You have started 3 conversations, including this one, and made a total of 6 posts to those 3 conversations, and none of them contain any images, screen shots, of any kind. So I have no idea what you want to remove.
This forum you have posted in, Community Help, is for getting help using the this forum system.
Have you posted in the correct forum?
Please attach an image. Or go into more detail.
Just writing 'how?!' does not give ACPs enough info to help you out.
Where are you wanting to remove images from? The Forum? Software? Your Computer? Behance? Adobe Portfolio?
Is this a question about Adobe Stock images?
You can edit and delete files from your Stock Contributor portal. See link below for details.