How to remove tooltip?

I think there is no real way to remove the tooltip. Just select the text around it and replace it with normal text... ;-)

Currently there is no plan to add this feature in the near future, but I see it would be really useful.
If you don't want to go to the source code, you can select the text, delete it and write it back.

If someone has time to implemented, I will be happy to test it and commit it.

I am adding this as a note how to reproduce it:

This happens when use the tooltip on a word. It doesn't happen when you use the default blue circle with the letter "i". If you use it with the default blue circle you can just click it and hit backspace.