Updated mediawiki/extensions
Project: mediawiki/extensions/Flow  eb3b67dfea79a39bc8413b57231799bcbea397f0

Get rid of unused file

IIRC, we quickly slapped this together back when header did not have the JS
interaction (like posts had), and we were always sent to the separate
&action=edit-header page, but still wanted to add an editor.

Now, editor & the submissions of data, handling of errors, ... is all JS-based
for header too. The only ones on &action=edit-header will be non-JS users, so it
no longer makes sense to have this file that only loads & unloads the editor on
there. Also, the file is not even in Resources.php, so was never even loaded
anymore.

Change-Id: I92a4a75093500bf7d50ddfd00e1233676ab23548