Quieten eshell compilation

* lisp/eshell/em-dirs.el (eshell-dirs-initialize, eshell/pwd):
* lisp/eshell/em-script.el (eshell-script-initialize):
* lisp/eshell/em-unix.el (eshell/whoami):
* lisp/eshell/esh-proc.el (eshell/jobs): Mark unused arguments.

lisp/eshell/em-dirs.el

@@ -207,7 +207,7 @@ Thus, this does not include the current directory.")
   (when eshell-cd-on-directory
     (make-local-variable 'eshell-interpreter-alist)
     (setq eshell-interpreter-alist
-	  (cons (cons #'(lambda (file args)
+	  (cons (cons #'(lambda (file _args)
                           (eshell-lone-directory-p file))
 		      'eshell-dirs-substitute-cd)
 		eshell-interpreter-alist)))
@@ -300,7 +300,7 @@ Thus, this does not include the current directory.")
 		    (file-name-as-directory (cdr user))))
 		 eshell-user-names)))))))
 
-(defun eshell/pwd (&rest args)
+(defun eshell/pwd (&rest _args)
   "Change output from `pwd' to be cleaner."
   (let* ((path default-directory)
 	 (len (length path)))

lisp/eshell/em-script.el

@@ -61,7 +61,7 @@ This includes when running `eshell-command'."
   "Initialize the script parsing code."
   (make-local-variable 'eshell-interpreter-alist)
   (setq eshell-interpreter-alist
-	(cons (cons #'(lambda (file args)
+	(cons (cons #'(lambda (file _args)
                         (string= (file-name-nondirectory file)
                                  "eshell"))
                     'eshell/source)

lisp/eshell/em-unix.el

@@ -965,7 +965,7 @@ Show wall-clock time elapsed during execution of COMMAND.")
 				  (eshell-stringify-list
 				   (eshell-flatten-list (cdr time-args))))))))
 
-(defun eshell/whoami (&rest args)
+(defun eshell/whoami (&rest _args)
   "Make \"whoami\" Tramp aware."
   (or (file-remote-p default-directory 'user) (user-login-name)))
 

lisp/eshell/esh-proc.el

@@ -158,7 +158,7 @@ The signals which will cause this to happen are matched by
 
 (defalias 'eshell/wait 'eshell-wait-for-process)
 
-(defun eshell/jobs (&rest args)
+(defun eshell/jobs (&rest _args)
   "List processes, if there are any."
   (and (fboundp 'process-list)
        (process-list)