Is your feature request related to a problem? Please describe.

EncodeJSONResponse is currently in routers.go, but it's not even used in that file.

Personally, I don't use the routers feature provided by the generator, so I'd like to delete this file, but I can't because there is a function in it used by other code in the package.

Describe the solution you'd like

Move EncodeJSONResponse to helpers.go: it's a much better place for such a function.

Describe alternatives you've considered

Move the EncodeJSONResponse to its own file, but I don't think that's necessary.

Additional context

Happy to provide a PR if we can agree to the above.