Make cl-concatenate an alias of seq-concatenate

* lisp/emacs-lisp/cl-extra.el (cl-concatenate): Use defalias instead
of apply.  This is simpler and more efficient.

Author: npostavs

lisp/emacs-lisp/cl-extra.el

@@ -552,10 +552,9 @@ too large if positive or too small if negative)."
   (seq-subseq seq start end))
 
 ;;;###autoload
-(defun cl-concatenate (type &rest sequences)
+(defalias 'cl-concatenate #'seq-concatenate
   "Concatenate, into a sequence of type TYPE, the argument SEQUENCEs.
-\n(fn TYPE SEQUENCE...)"
-  (apply #'seq-concatenate type sequences))
+\n(fn TYPE SEQUENCE...)")
 
 ;;; List functions.