ocaml.kak: remove invalid unset-option static_words hook

unsetting static_words whenever any buffer filetype is set to non ocaml
is wrong, it breaks static_words for every filetype whose filetype hook
run before the ocaml ones.

rc/base/ocaml.kak

@@ -54,8 +54,5 @@ hook global WinSetOption filetype=(?!ocaml).* %{
     hook global WinSetOption filetype=ocaml %{
       set-option window static_words $keywords
     }
-    hook global WinSetOption filetype=(?!ocaml).* %{
-      unset window static_words
-    }
   "
 }