trivial: fix assignment-from-no-return pylint warning (#52732)

pylint.rc

@@ -8,7 +8,6 @@ cache-size=500
 disable=
     abstract-method,
     arguments-differ,
-    assignment-from-no-return,
     attribute-defined-outside-init,
     broad-except,
     consider-using-dict-comprehension,

wcs/formdef.py

@@ -405,7 +405,7 @@ class FormDef(StorableObject):
             # or if there are not yet any submitted forms
             if self.id is None or self.data_class().count() == 0:
                 self.internal_identifier = new_internal_identifier
-        t = StorableObject.store(self)
+        StorableObject.store(self)
         if get_publisher().snapshot_class:
             get_publisher().snapshot_class.snap(instance=self, comment=comment)
         if get_publisher().is_using_postgresql():
@@ -413,7 +413,6 @@ class FormDef(StorableObject):
 
             sql.do_formdef_tables(self, rebuild_views=True, rebuild_global_views=True)
         self.store_related_custom_views()
-        return t
 
     def store_related_custom_views(self):
         for view in getattr(self, '_custom_views', []):