Removed links to forum in header and footer (#1686)

Co-authored-by: Christopher Bradford <christopher.bradford@datastax.com>

Author: bradfordcp

docs/config/_default/config.toml

@@ -262,11 +262,6 @@ gzip = true
   weight = 60
   url = "https://k8ssandra.io/community"
 
-[[menu.main]]
-  name = "Forum"
-  weight = 70
-  url = "https://forum.k8ssandra.io/"
-
 [[menu.main]]
   name = "Blog"
   weight = 80
@@ -292,11 +287,6 @@ gzip = true
   weight = 80
   url = "https://k8ssandra.io/community"
 
-[[menu.second]]
-  name = "Forum"
-  weight = 70
-  url = "https://forum.k8ssandra.io/"
-
 [[menu.second]]
   name = "Blog"
   weight = 80