requirements.md: Fix duplicated 4.6 tab (#2885)

Author: adriendupuis

docs/getting_started/requirements.md

@@ -129,10 +129,6 @@ For production setups it's recommended that you use Varnish/Fastly, Redis, NFS/E
 
     - 8.3
 
-=== "[[= product_name =]] v4.6"
-
-    - 8.3
-
 === "[[= product_name =]] v4.6"
 
     - 8.3