don't really need depth

spec/app_spec.rb

@@ -91,13 +91,11 @@ describe "app" do
         c["created_at"].should_not be_nil
         c["updated_at"].should_not be_nil
         c["children"].length.should == 2
-        c["depth"].should == 1
         children = c["children"].reject{|comment| comment["title"] != "comment title 0"}.first
         children.should_not be_nil
         children["id"].should == sub_comment[0].id
         children["created_at"].should_not be_nil
         children["updated_at"].should_not be_nil
-        children["depth"].should == 2
       end
     end
     describe "GET on /api/v1/comments/:comment_id" do