How do I uninstall a Rails plugin?

I tried to make multiple files uploading, and did this:

rails plugin install g开发者_运维知识库it://github.com/kpitn/swfupload.git

and now any rails ... command throws an error:

.../vendor/plugins/swfupload/lib/swfupload.rb:18: undefined method `middleware' for ActionController::Dispatcher:Class (NoMethodError)

that's why i can't even uninstall this plugin

That stops everything i do, i'm just lost

What is the solution? I couldn't find something explaining about middleware in rails 3 context

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Delete the vendor/plugins/swfupload directory.