Hi, which RubyMine version do you use? On startup RubyMine sync Ruby SDKs with ~/.rvm/rubies and ~/.rvm/gems folder. Please check that the folders doesn't contain your removed sdks traces. Also you can alway remove SDK using "remove sdk" button in RubyMine | File | Settings | Ruby SDK and Gems Manager panel.
Hi, which RubyMine version do you use? On startup RubyMine sync Ruby SDKs with ~/.rvm/rubies and ~/.rvm/gems folder. Please check that the folders doesn't contain your removed sdks traces. Also you can alway remove SDK using "remove sdk" button in RubyMine | File | Settings | Ruby SDK and Gems Manager panel.

Never mind.
After restarting the application I was able to delete them.