How to delete plugin data on "Plugins -> Delete"

I am having same problem, After deactivating and deleting the plugin still there is some date left. SO when I reinstall the plugin I get all the settings back again. I want to remove this data.

I agree. We have a deactivation hook but not a deletion hook. I don’t want to delete the options on deactivation, only on deletion. Hopefully this can be added to the core in the next version. Currently it doesn’t seem to be in up to the 3.1 version.

This problem has been solved, I have a post here in detail. Be careful while taking any action. Backup your database first.
https://techshali.com/how-to-completely-remove-plugin-data-after-deleting-it/