Geiser now has support locating the project root and adding it to the load
path without external help; leverage it.
* .dir-locals.el [nil]: Remove obsolete Geiser configuration. Set the
geiser-repl-per-project-p variable to t.
* doc/contributing.texi (The Perfect Setup): No longer mention explicitly
setting the geiser-guile-load-path; instead mention the effect of the
.dir-locals.el file.
Reported-by: Wolf <wolf@wolfsden.cz>
65dcfb3f38