Hotkeys are not deleted when pressing [Delete] in input options

[valkyrienyanko]

Steps to Reproduce

1. Double click on res://Framework/Scenes/Options/Options.tscn and run this scene with F6
2. Go to Options > Input, click on the +, add a new keybind
3. Select the hotkey you just created and delete it with the [Delete] key
4. Press Esc to go back to the main menu
5. Go back to Options > Input and notice the key you deleted came back

Observations

• Pressing Reset to Defaults will delete all newly added keys with 100% success. So why isn't it working when deleting a specific key?