Need help removing rigid toilet supply line

[seasea]

As the title states, I'm trying to remove my fixed supply line and install a rigid one.

I've removed the bottom nut that connects the line to the valve, but I can't figure out how to remove the top part of the line that connects to the tank.

Thanks for the help, pictures attached below.

~ Christian

 

[breplum]

I used to own a Ridgid tubing bender to make those bends.
Sold it long ago and only use flex connectors now.
To remove a 'classic' WC tube, there will be a flange at the ballcock and an escutcheon on the low end. Pull up to deform the tube and pull out the stub into the angle stop.
Replace the angle stop while you are at it with a quarter turn...

 

[johnjh2o]

remove the brass nut.