I would advise against removing the individual Folders (3D Printers, 3DLUTs, Actions, , …); if at all I would only consider removing their content (the ant-files, abr-files, …).
But you should be able to test the issue yourself by moving the Folders’ contents to some other location, restarting Photoshop and starting working – if problems arise you can still move the Folders/Files back.
Thanks for your reply. So to be on the safeside it would be best to keep the folders and delete only the files, correct?
Is my assumption correct that in order to delete all the default action sets, tool sets and so on these are the files to delete? Is there alsosomething I must do in Library/Application Support or Library/Preferences?
There is another location to store presets (in the user library) for Photoshop but the Preset Folders in the application folder hold the default presets.
As Photoshop seems to "check" these Folders automatically at starting I suspect the absence of the Folders themselves might cause problems.
Are there any Adobe Employees here who could comment on this?