How to delete a project in GitLab
- Go to the project page
- Select "Settings"
- Select the "General" section (you must be in the repository you want to delete to delete it)
- If you have enough rights, then at the bottom of the page will be a button for "Advanced settings" (i.e. project settings that may result in data loss) or "Remove project" (in newer GitLab versions)
✅ Just at the bottom of your project settings.
New version 
Setting->Advance(Expand it)->RemoveProject
click After The Remove Project button Browser Display One Confirm Box Then Click On Ok and remove your project from Gitlab
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