How could i remove my approval from a pull request on github

Question

I approved a pull request of a random repository I do not have write access too. How can I remove or delete that approval?

Answer 1

For quick resolution,I suggest to Dismiss the review by stating the reason.

Note: It will be recorded in the history of events of the PR that you had approved & dismissed earlier.

Answer 2

You can also re-request your own review (the refresh symbol next to your green tick)