Add deno uninstall to install modules

[KanseiKy]

Similar to how npm uninstall works, I would like this feature to be added. You can pass the full URL used during the installation. Examples:

$ deno uninstall https://deno.land/std/node/module.ts # Uninstall via URL
$ deno un https://deno.land/std/path/mod.ts           # Shorthand for `uninstall`

This way, we can uninstall modules faster rather than browsing the ~/.deno/bin directory and uninstall the desired module

[crowlKats]

Duplicate of #3139