Remove disabled legacy code in ffplay.
The code was setting aspect ratio from the DTG active format, and was
present and disabled since the creation of ffplay.
Subject: [FFmpeg-devel] [PATCH] Cosmetics: adopt compact notation in
Date: Sat, 12 Feb 2011 18:46:19 +0100
Signed-off-by: Mans Rullgard <email@example.com>
(cherry picked from commit b7ec5cc4013242a9f30c429d2ce9c20ec01b03eb)