erp5_forge: installation_state isn't a valid column to use on catalog queries anymore

See merge request nexedi/erp5!1476

bt5/erp5_forge/SkinTemplateItem/portal_skins/erp5_toolbox/Base_reportInstalledBusinessTemplateModification.py

@@ -11,7 +11,6 @@ bt_list = [
   x.getObject()
   for x in portal.portal_catalog(
     portal_type="Business Template",
-    installation_state="installed",
     )
   if x.getInstallationState() == "installed" and x.getTitle() not in black_list and x.getId() not in black_list
 ]