Drop link to ribbon cdn

Author: aneta-petrova

guides/common/header.adoc

@@ -6,11 +6,6 @@
 :toclevels: 3
 ifndef::satellite[]
 :docinfodir: common
-++++
-<!-- "Fork me on GitHub" CSS ribbon v0.2.3 | MIT License -->
-<!-- https://github.com/simonwhitaker/github-fork-ribbon-css -->
-<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/github-fork-ribbon-css/0.2.3/gh-fork-ribbon.min.css" />
-++++
 endif::[]
 ifeval::["{DocState}" == "nightly"]
 :revnumber: Nightly