Remove mention of treesit-defun-prefer-top-level (bug#74474)

Remove mention of treesit-defun-prefer-top-level (bug#74474)

treesit-defun-prefer-top-level is removed before Emacs 29
released and was replaced by treesit-defun-tactic.  These
statements that set it doesn't do anything other than introduce
confusion, so we should remove them.

* lisp/progmodes/c-ts-mode.el (c-ts-base-mode):
* lisp/progmodes/js.el (js-ts-mode):
* lisp/progmodes/php-ts-mode.el (php-ts-mode):
* lisp/progmodes/ruby-ts-mode.el (ruby-ts-mode):
* lisp/progmodes/typescript-ts-mode.el:
(typescript-ts-base-mode):
Remove statements setting treesit-defun-prefer-top-level.