org-export: Fix error when calling "l" from dispatcher

* contrib/lisp/org-export.el (org-export-dispatch): Fix error when
  calling "l" from dispatcher.

contrib/lisp/org-export.el

@@ -4033,7 +4033,6 @@ Return an error if key pressed has no associated command."
       (?l
        (require 'org-e-latex)
        (org-e-latex-export-to-latex
-	(require 'org-e-latex)
 	(memq 'subtree optns) (memq 'visible optns) (memq 'body optns)))
       (?p
        (require 'org-e-latex)