Can you be more specific about what is the security issue and what you are trying to achieve? If you are saying you want to hide a request from browser should not be shown in the browser developer tools, I don't think that is possible. And its not just developer tools that can be used to look at network traffic. There could be other tools too like fiddler.
in our application We have created a mashup which has a custom skin. Currently when loading the mashup application we can see that a number of OpenSans font files are severed to the browser. We want to suppress these files from been loaded to reduce the overall page size. We have created a custom skin with all the default mixins displayed and the typography seating to not refer to Open sans. We have then set our mashup to use this skin. One inspecting the css file generated by the skin rule will still see references to the Opensans font family.
How should we approach suppressing this completely ?