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>

fprintd.spec

@@ -70,9 +70,6 @@ if [ $1 -eq 0 ]; then
   /sbin/authconfig --disablefingerprint --update || :
 fi
 
-%clean
-rm -rf $RPM_BUILD_ROOT
-
 %files -f %{name}.lang
 %defattr(-,root,root,-)
 %doc README COPYING AUTHORS TODO