git-remote-mediawiki: don't "use encoding 'utf8';"

The use of this statement is generally discouraged, and is too intrusive
for us: it forces the HTTP requests made by the API to contain only valid
UTF-8 characters. This would break the upload of binary files.

Signed-off-by: Matthieu Moy <Matthieu.Moy@imag.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

contrib/mw-to-git/git-remote-mediawiki

@@ -36,11 +36,10 @@
 use strict;
 use MediaWiki::API;
 use DateTime::Format::ISO8601;
-use encoding 'utf8';
 
-# use encoding 'utf8' doesn't change STDERROR
-# but we're going to output UTF-8 filenames to STDERR
+# By default, use UTF-8 to communicate with Git and the user
 binmode STDERR, ":utf8";
+binmode STDOUT, ":utf8";
 
 use URI::Escape;
 use IPC::Open2;