ignore /var/lib/pycentral/pkgremove

autoscripts/preinst-pycentral-clean

 # make sure python-central files are removed before new package is installed
-if [ -f /var/lib/pycentral/#PACKAGE#.pkgremove ] || [ -f /var/lib/pycentral/pkgremove ]
+if [ -f /var/lib/pycentral/#PACKAGE#.pkgremove ]
 then
 	pycentral pkgremove #PACKAGE#
 	rm -f /var/lib/pycentral/#PACKAGE#.pkgremove