* gnu/packages/aux-files/emacs/guix-emacs.el: Do not try to require
'guix-profiles'. Do not call 'guix-emacs-autoload-packages' in the top
level.
(guix-package-enable-at-startup): Remove. This variable can't be set by
a user since this file is loaded before user config.
(guix-emacs-autoload-packages): Use 'guix-read-package-profile' instead
of 'guix-profile-prompt' in interactive clause (it was renamed in
Emacs-Guix).
* gnu/packages/emacs.scm (emacs)[arguments]: Call
'guix-emacs-autoload-packages' in "site-start.el" after requiring
'guix-emacs'.