Remove unused parameters from cider-default-err-handler

Author: cichli

cider-interaction.el

@@ -1301,7 +1301,7 @@ into a new error buffer."
        ;; after it has been handled, so it's fine to set it unconditionally here
        (setq causes (cider--handle-stacktrace-response response causes))))))
 
-(defun cider-default-err-handler (buffer ex root-ex session)
+(defun cider-default-err-handler (session)
   "Make an error handler for BUFFER, EX, ROOT-EX and SESSION.
 This function determines how the error buffer is shown, and then delegates
 the actual error content to the eval or op handler."

nrepl-client.el

@@ -812,7 +812,8 @@ for functionality like pretty-printing won't clobber the values of *1, *2, etc."
 ;; After being decoded, responses (aka, messages from the server) are dispatched
 ;; to handlers. Handlers are constructed with `nrepl-make-response-handler'.
 
-(defvar nrepl-err-handler 'cider-default-err-handler
+(defvar nrepl-err-handler '(lambda (_buffer _ex _root-ex session)
+                             (cider-default-err-handler session))
   "Evaluation error handler.")
 
 (defvar-local nrepl--input-handler-queue (make-queue)