Revert "gnu: gitolite: Fix shebangs in hooks."

This change embedded store references in the shebangs of scripts that
were meant to be copied out of the store. Those scripts would break when
the interpreters expected by the shebangs were garbage collected.

<https://debbugs.gnu.org/cgi/bugreport.cgi?bug=25966#28>

This reverts commit d0c16adb19.

gnu/packages/version-control.scm

@@ -616,17 +616,6 @@ (define-public gitolite
                         (substitute* (find-files "." ".*")
                           ((" perl -")
                            (string-append " " perl " -"))))))
-                  (add-before 'install 'fix-hooks-shebangs
-                    (lambda* (#:key inputs #:allow-other-keys)
-                      (let ((perl (string-append (assoc-ref inputs "perl")
-                                                 "/bin/perl")))
-                        ;; The files in 'lib/Gitolite/Hooks' keep references to
-                        ;; '/usr/bin/perl', without this fix it is impossible to
-                        ;; to run gitolite in production.
-                        (substitute* (find-files "src/lib/Gitolite/Hooks" ".*")
-                          (("/usr/bin/perl")
-                           perl))
-                        #t)))
                   (replace 'install
                     (lambda* (#:key outputs #:allow-other-keys)
                       (let* ((output (assoc-ref outputs "out"))