libprelude: removed obsolete tweaks from package conf file because prefix='usr' is the default anyway

security/libprelude/libprelude.conf

@@ -12,10 +12,6 @@
 # the Free Software Foundation; version 2 of the License. A copy of the
 # GNU General Public License can be found in the file COPYING.
 # --- SDE-COPYRIGHT-NOTE-END ---
-if [ $prefix_auto = 1 ] ; then
-        prefix="usr"
-        set_confopt
-fi
 
 if pkginstalled perl; then
 	# install perl modules into vendor