guix lint: Remove duplicated module lines.

* guix/scripts/lint.scm (guix): Remove duplicated lines for using
  'srfi-34' and 'srfi-35' modules.  These lines were introduced twice by
  commits b210b35 and 002c57c.

guix/scripts/lint.scm

@@ -34,8 +34,6 @@
   #:use-module (ice-9 regex)
   #:use-module (ice-9 format)
   #:use-module (web uri)
-  #:use-module (srfi srfi-34)
-  #:use-module (srfi srfi-35)
   #:use-module ((guix build download)
                 #:select (maybe-expand-mirrors
                           open-connection-for-uri))