index: remove note on creating pages for questions This is not a thing now that it's not a world editable wiki. Change-Id: Ie6e97cc1581ea46b023bf1598f8d0ac1f15d2100 Reviewed-on: https://go-review.googlesource.com/c/wiki/+/660115 Reviewed-by: Ian Lance Taylor <iant@golang.org> Auto-Submit: Ian Lance Taylor <iant@golang.org> Commit-Queue: Ian Lance Taylor <iant@golang.org>