Xbox
Delete any saves associated with the Content. Clear your 2 GB/1.86265 GiB reserve space.
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While clearing the reserve data will remove Creation Club Content, note that there is over 4 GB for the entirety of the packages. Downloading does not fill mod reserve space, but there is only one folder to delete on Xbox which, unfortunately, also contains mods.
PlayStation
Delete any saves associated with the Content. Re-install your game.
PC
Navigate to Steam\SteamApps\Fallout 4\Data and find the appropriate file. It is recommended you simply move the file to another folder rather than delete so you do not have to re-download.
Treat Creation Club Content as DLC and as Mods
On Xbox, Creation Club Content is not separated into Season Pass folders like the original DLC.
When attempting to uninstall, do not return to a save they were installed upon. They cannot be removed in the middle of a game without serious consequences to ongoing saves.