I went to the Blender 2.90 manual
I wanted to learn how to delete multiple drivers on my own using these instructions from the manual.
Quote from the manual:
Context menu ‣ Delete Driver(s)
Context menu ‣ Delete Single Driver
Removes driver(s) associated with the property, either for the single selected property or sub-channel, or all components of a vector.
This gave absolutely zero hints for what to do. I had to search every single menu and found no such Delete Driver(s) or Delete Single Driver.
I wasted so much time using the manual. It’s almost like it was written for another software it was so off.
On my own I figured out what to do. Go to Blender Driver Editor panel mouse drag a box over all the drivers on the left, go to the Channel menu > Delete Channels or use key X