PCGW usually lists skipping intro at pretty much top of the page. Sometimes it's simple launch parameter, other times commenting lines in config files, some needs renaming/removing files and some replacing files.
Just use that -skipintro with Steam. Other versions require making custom shortcut to add that because uplay sucks and doesn't have that kind of function. If it's wasted HDD space you are conserned about then just get few extra terabytes which costs next to nothing these days.