Remove page "Resources for Editors"

This page was initially introduced to provide some information and
conventions for people editing this guide. However, the page is
only valualbe, if visible and commonly used.

Unless a general convention is established if and how to provide
information about editing a specific guide, the page is of little
value and should be removed.

Related: #255

Author: sypets

Documentation/Appendix/Index.rst

@@ -17,4 +17,3 @@ in more depth than what is already described in the main section.
    Windows/Index
    Linux/Index
    *
-   ResourcesForEditors/Index