You may have your answer.. How about making the link display conditionally depending upon the location you are in? Can you add a global application item with a value you set to show if you are in development or another environment?
Create a Build Option. In the development environment set the Status to Include, and Default on Export to Exclude.
Apply the Build Option to the Feedback page and navbar entry. When the app is imported into a different environment the Feedback link and page won't be rendered.