gexp: Remove workarounds for <https://bugs.gnu.org/15602>.

* gnu/services/base.scm (hydra-key-authorization)[aaa]: Remove.
[default-acl]: Don't import it.
* guix/scripts/pack.scm (store-database)[build]: Don't import
(gnu build install).

gnu/services/base.scm

@@ -1515,19 +1515,9 @@ GID."
 (define (hydra-key-authorization keys guix)
   "Return a gexp with code to register KEYS, a list of files containing 'guix
 archive' public keys, with GUIX."
-  (define aaa
-    ;; XXX: Terrible hack to work around <https://bugs.gnu.org/15602>: this
-    ;; forces (guix config) and (guix utils) to be loaded upfront, so that
-    ;; their run-time symbols are defined.
-    (scheme-file "aaa.scm"
-                 #~(define-module (guix aaa)
-                     #:use-module (guix config)
-                     #:use-module (guix memoization))))
-
   (define default-acl
     (with-extensions (list guile-gcrypt)
       (with-imported-modules `(((guix config) => ,(make-config.scm))
-                               ((guix aaa) => ,aaa)
                                ,@(source-module-closure '((guix pki))
                                                         #:select? not-config?))
         (computed-file "acl"

guix/scripts/pack.scm

@@ -126,13 +126,9 @@ dependencies are registered."
 
   (define build
     (with-extensions gcrypt-sqlite3&co
-      ;; XXX: Adding (gnu build install) just to work around
-      ;; <https://bugs.gnu.org/15602>: that way, (guix build store-copy) is
-      ;; copied last and the 'store-info-XXX' macros are correctly expanded.
       (with-imported-modules (source-module-closure
                               '((guix build store-copy)
-                                (guix store database)
-                                (gnu build install)))
+                                (guix store database)))
         #~(begin
             (use-modules (guix store database)
                          (guix build store-copy)