[gnome-user-docs] Remove music-player-notrecognized

[David King <davidk src gnome org>]

commit 8e18c8fc7707e2964e891337a0660471eb61996d
Author: David King <amigadave amigadave com>
Date:   Sat Sep 20 11:47:44 2014 +0100

    Remove music-player-notrecognized
    
    The documented behaviour is specific to Rhythmbox (it seems) and
    described in the Rhythmbox help.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=736705

 gnome-help/C/music-player-notrecognized.page |   34 --------------------------
 1 files changed, 0 insertions(+), 34 deletions(-)