Remove %clean section

None of currently supported distributions need that.
Last one was EL5 which is EOL for a while.

Signed-off-by: Igor Gnatenko <ignatenkobrain@fedoraproject.org>

passwd.spec

@@ -64,9 +64,6 @@ for dir in $(ls -1d $RPM_BUILD_ROOT%{_mandir}/{??,??_??}) ; do
 done
 
 
-%clean
-rm -rf $RPM_BUILD_ROOT
-
 %files -f %{name}.lang
 %defattr(-,root,root,-)
 %{!?_licensedir:%global license %%doc}