Don’t duplicate top level definitions
Don’t duplicate top level definitions

In the `skaffold.yaml` reference documentation,
under the `profiles` section, don’t duplicate the
top-level definition of `portForward`.

Signed-off-by: David Gageot <aa743a0aaec8f7d7a1f01442503957f4d7a2d634@gageot.net>
GoogleContainerTools/skaffold,GoogleContainerTools/skaffold,GoogleContainerTools/skaffold,GoogleContainerTools/skaffold,GoogleContainerTools/skaffold,GoogleContainerTools/skaffold,GoogleContainerTools/skaffold,GoogleContainerTools/skaffold,GoogleContainerTools/skaffold