Disable functionality reported in T60766 & only partially worked. This could be used if the key-map was added after Blender started as a way to customize modal key-maps, however it didn't work with the add-on enabled on startup. Add-on key-maps are intended to extend existing key-maps so they can call the add-on, not as a way to change modal key-maps for Blender's built-in functionality. Disable this since it's not needed as add-ons can't yet define modal key-maps.