There’s not usually a lot to do after you’ve completed the steps above — indeed, if you’re merely installed files direct from the archive, or whatever, there will be precisely nothing left, by way of debris.
Things you might care to clean up are:
zip file, or the like;
dtx and ins files, if you chose not
to install them with the documentation; and
aux, log, idx, etc.,
from building the documentation.
This question on the Web: http://www.tex.ac.uk/cgi-bin/texfaq2html?label=inst-tidy