Remove debug code for stdlib whitelist
Remove debug code for stdlib whitelist

Now that our blacklist is a single file this code does not serve any purpose.
It was added back when the whitelist was the main file as a way to copy files
from the blacklist to the whitelist.

lampepfl/dotty,sjrd/dotty,sjrd/dotty,sjrd/dotty,dotty-staging/dotty,som-snytt/dotty,som-snytt/dotty,lampepfl/dotty,som-snytt/dotty,som-snytt/dotty,lampepfl/dotty,dotty-staging/dotty,lampepfl/dotty,dotty-staging/dotty,dotty-staging/dotty,dotty-staging/dotty,lampepfl/dotty,sjrd/dotty,som-snytt/dotty,sjrd/dotty