No way to `remove` or `rename` remote `upstream`

Steps to Reproduce:

• Start with this Extension with some forked repo
• Remove upstream remote

git remote remove upstream

• upstream will be back
• Logs

$ git remote -v
origin  https://github.com/gitpod-io/openvscode-server.git (fetch)
origin  https://github.com/gitpod-io/openvscode-server.git (push)
upstream        https://github.com/microsoft/vscode.git (fetch)
upstream        https://github.com/microsoft/vscode.git (push)
$ git remote remove upstream
$ git remote -v
origin  https://github.com/gitpod-io/openvscode-server.git (fetch)
origin  https://github.com/gitpod-io/openvscode-server.git (push)
upstream        https://github.com/microsoft/vscode.git (fetch)
upstream        https://github.com/microsoft/vscode.git (push)
$ 

• code https://github.com/microsoft/vscode-pull-request-github/blob/7c3437d461ca2e611a71dbdc638abf67b8595ba3/src/github/folderRepositoryManager.ts#L643

[froboy]

@alexr00 as the original reporter of the Gitpod issue I really appreciate your solution - protecting existing functionality for novice users but attempting to take notice when folks doing advanced stuff (like me in this situation) try to push against it. Thank you!

[jeanp413]

We can even go one step further: if we notice that we’ve add the same upstream remote twice in one “session”, which would imply that you’re trying get rid of or otherwise modify the upstream remote that we depend on, we can show a notification suggesting that you change some settings.

Sounds good, thanks 👍