DEV: Remove code that is not necessary (#643)

Calling `expand_if_needed` is not necessary here.

Author: tgxworld

spec/system/bulk_assign_spec.rb

@@ -39,7 +39,6 @@
       # opening with `is-expanded` property, but it isn't actually expanded.
       select_kit.collapse
 
-      select_kit.expand_if_needed
       select_kit.search(assignee)
       select_kit.select_row_by_value(assignee)
       select_kit.collapse

spec/system/group_assigned_spec.rb

@@ -39,7 +39,6 @@
     # opening with `is-expanded` property, but it isn't actually expanded.
     select_kit.collapse
 
-    select_kit.expand_if_needed
     select_kit.search(assignee)
     select_kit.select_row_by_value(assignee)
     select_kit.collapse