docs: Update WAF documentation banner content (#1192)

* docs: Update WAF documentation banner content

Removed reference to old documentation as the old docs are not available any more

Author: JTorreG

_banners/waf-unification-notice.md

@@ -2,6 +2,4 @@
 
 Welcome to the F5 WAF for NGINX documentation! This product was formerly known as NGINX App Protect WAF.
 
-Documentation is being incrementally rewritten: if you're looking for information that hasn't been re-integrated yet, you can still browse [the old documentation]({{< ref "/nap-waf" >}}).
-
-{{< /banner >}}
+{{< /banner >}}

content/nic/configuration/global-configuration/command-line-arguments.md

@@ -666,7 +666,7 @@ The default value is `false`.
 
 When enabled, the controller automatically adjusts `proxy_buffers`, `proxy_buffer_size`, and `proxy_busy_buffers_size` to ensure they work together properly and NGINX can start successfully.
 
-More explanation about this feature can be found in the guide [here]({{< ref "/nic/installation/configuration/proxy-buffers-configuration.md" >}}).
+More explanation about this feature can be found in the guide [here]({{< ref "/nic/configuration/proxy-buffers-configuration.md" >}}).
 
 <a name="cmdoption-enable-directive-autoadjust"></a>