Uninstalling Rust downloads the whole Rust again

[sim4life]

Running the uninstall script on Mac OS X
curl -s https://static.rust-lang.org/rustup.sh | sudo sh -s -- --uninstall
downloads the while ~200MB of rust sources and then uninstalls the already installed Rust binaries.
It should NOT download the rust sources in case the uninstall option is given.

[brson]

I have a todo to include an uninstall script with the installation.

[brson]

cc #21117