Remove MangaDex module tests

spec/spec_helper.cr

@@ -1,4 +1,5 @@
 require "spec"
+require "../src/queue"
 require "../src/server"
 require "../src/config"
 
@@ -52,14 +53,3 @@ def with_storage
     end
   end
 end
-
-def with_queue
-  with_default_config do
-    temp_queue_db = get_tempfile "mango-test-queue-db"
-    queue = MangaDex::Queue.new temp_queue_db.path
-    clear = yield queue, temp_queue_db.path
-    if clear == true
-      temp_queue_db.delete
-    end
-  end
-end