[repl] Don't override cider-print-fn in REPL eval requests

This is a bugfix introduced when we switched exclusively to plists instead of
maps.

Author: alexander-yakushev

cider-repl.el

@@ -1082,8 +1082,6 @@ and responding to them.")
 (defun cider--repl-request-plist ()
   "Plist to be merged into REPL eval requests."
   `(,@(cider--nrepl-print-request-plist fill-column)
-    ,@(unless cider-repl-use-pretty-printing
-        `("nrepl.middleware.print/print" "cider.nrepl.pprint/pr"))
     ,@(when cider-repl-use-content-types
         `("content-type" "true"))))