[TASK] Remove call for testing (#614)

Releases: main, 13.4

Co-authored-by: lina.wolf <[email protected]>

Documentation/Includes.rst.txt

@@ -1,19 +1,3 @@
 ..  this file can be used to include information on the top of each page
 ..  for example to add a hint for outdated versions
 
-..  attention::
-
-    We are revising the Getting Started guide for TYPO3 versions 12 and 13
-    (currently identical to the main branch for 14). Your feedback is essential
-    to help us make it even better!
-
-    You can contribute by:
-
-    *   Filling out this short
-        `survey <https://docs.google.com/forms/d/e/1FAIpQLSdA6zZk_I851np5SFxqWT0fptAgNexsRLWQyVFef7FLrG_b6Q/viewform>`_
-        to share your thoughts.
-    *   Joining the conversation in our Slack channel, **#typo3-documentation**.
-    *   Reporting any errors you find using the **"Report an issue"** button.
-
-    Thank you for helping us improve the guide!
-