🔥 Remove reference to noon-existing file

SilviaAmAm · SilviaAmAm · commit 0818dfea99af · 2024-05-01T09:57:05.000+02:00
diff --git a/backend/docs/install/index.rst b/backend/docs/install/index.rst
@@ -11,5 +11,4 @@ development, staging and production environments.
     :maxdepth: 2
 
     dev
-    staging
     production
