Remove duplicate line.

Change-Id: I0b32ccaaa7c9e0294ee7bc96fe4937a98d8461d5
Reviewed-on: https://code.wireshark.org/review/3394
Reviewed-by: Guy Harris <guy@alum.mit.edu>
(cherry picked from commit 6af06314576473c5d52844c9e2ee03c9455b50a3)
Reviewed-on: https://code.wireshark.org/review/3395