[frontend] Remove rubocop disable

Write condition as guard clause and remove rubocop disable.

src/api/app/models/bs_request.rb

@@ -1185,19 +1185,15 @@ def check_bs_request_actions!(opts = {})
       raisepriority(action.minimum_priority)
     end
 
-    return unless persisted?
-
-    # rubocop:disable Style/GuardClause
-    if priority_changed?
-      HistoryElement::RequestPriorityChange.create({
-        request:               self,
-        # We need to have a user here
-        user:                  User.find_nobody!,
-        description_extension: "#{priority_was} => #{priority}",
-        comment:               "Automatic priority bump: Priority of related action increased."
-      })
-    end
-    # rubocop:enable Style/GuardClause
+    return unless persisted? && priority_changed?
+
+    HistoryElement::RequestPriorityChange.create({
+      request:               self,
+      # We need to have a user here
+      user:                  User.find_nobody!,
+      description_extension: "#{priority_was} => #{priority}",
+      comment:               "Automatic priority bump: Priority of related action increased."
+    })
   end
 
   def _assignreview_update_reviews(reviewer, opts, new_review = nil)