[Tests] Remove a rails bug workaround

Fixed sometime in the last 5 years

test/unit/bulk_update_request_test.rb

@@ -149,12 +149,7 @@ class BulkUpdateRequestTest < ActiveSupport::TestCase
         @req.forum_updater.stubs(:update).raises(RuntimeError.new("blah"))
         assert_raises(RuntimeError) { @req.approve!(@admin) }
 
-        # XXX Raises "Couldn't find BulkUpdateRequest without an ID". Possible
-        # rails bug? (cf rails #34637, #34504, #30167, #15018).
-        # @req.reload
-
-        @req = BulkUpdateRequest.find(@req.id)
-        assert_equal("pending", @req.status)
+        assert_equal("pending", @req.reload.status)
       end
 
       should "downcase the text" do