I know it's possible to install a gem without the documentation, but unfortunately, I didn't for the first three months I used ruby. In that time, I managed to install a significant amount of gems, but not once since I started using ruby have I used the documentation on my computer. I always look to docs on the internet.
What is the best way to safely remove the documentation from my computer? Also, is there a way to configure ruby to not install documentation by default?
Gem documentation is installed in [RUBY]/lib/ruby/gems/doc, where [RUBY] is the directory into which you installed Ruby (C:/ruby on my machine).
I don't see why you shouldn't just delete the folders representing the gems for which don't don't need documentation: you can always regenerate it.