posts: remove unused appeal! method.

test/functional/moderator/dashboards_controller_test.rb

@@ -127,14 +127,10 @@ module Moderator
         end
 
         context "for appeals" do
-          setup do
-            as(@user) do
-              @post = create(:post, :is_deleted => true)
-              @post.appeal!("blah")
-            end
-          end
-
           should "render" do
+            @post = create(:post, is_deleted: true)
+            @appeal = create(:post_appeal, post: @post)
+
             get_auth moderator_dashboard_path, @admin
             assert_response :success
           end

test/functional/post_events_controller_test.rb

@@ -10,7 +10,7 @@ class PostEventsControllerTest < ActionDispatch::IntegrationTest
     as_user do
       @post = create(:post)
       @post.flag!("aaa")
-      @post.appeal!("aaa")
+      create(:post_appeal, post: @post)
       @post.approve!(@mod)
     end
   end