'force' argument in BusinessTemplate._install() should not mean clear catalog.

we can and should use 'update_catalog' argument instead to clear catalog.

product/ERP5/Document/BusinessTemplate.py

@@ -5269,13 +5269,6 @@ Business Template is a set of definitions, such as skins, portal types and categ
             item.install(self, force=force, object_to_update=object_to_update, 
                                trashbin=trashbin, installed_bt=installed_bt)
 
-      # update catalog if necessary
-      if update_catalog is _MARKER and force and self.isCatalogUpdatable():
-        # override update_catalog parameter only if value
-        # is not explicitely passed.
-        update_catalog = 1
-      elif update_catalog is _MARKER:
-        update_catalog = 0
       if update_catalog:
         catalog = _getCatalogValue(self)
         if (catalog is None) or (not site.isIndexable):