(command-line): Use custom-reevaluate-setting to handle tooltip-mode.

Delete obsolete comment.

lisp/startup.el

@@ -752,15 +752,7 @@ or `CVS', and any subdirectory that contains a file named `.nosearch'."
   ;; are not set.
   (custom-reevaluate-setting 'blink-cursor-mode)
   (custom-reevaluate-setting 'normal-erase-is-backspace)
-
-  ;; If you change the code below, you need to also change the
-  ;; corresponding code in the tooltip-mode defcustom.  The two need
-  ;; to be equivalent under all conditions, or Custom will get confused.
-  (unless (or noninteractive
-	      emacs-basic-display
-              (not (display-graphic-p))
-              (not (fboundp 'x-show-tip)))
-    (tooltip-mode 1))
+  (custom-reevaluate-setting 'tooltip-mode)
 
   ;; Register default TTY colors for the case the terminal hasn't a
   ;; terminal init file.