Uninstall

You dragged it to the Trash and macOS refused, or it came back on its own. Here is every reason a Mac app won't delete, in the order it usually turns out to be, with the fix for each one and an honest answer for the case you can't fix yourself.

Dragging an app to the Trash removes only the .app bundle; its files stay in ~/Library. How to uninstall apps on Mac completely, by hand or with a free tool.