[rhythmbox] Remove references to non-existing 'Music' menu item

[Andre Klapper <aklapper src gnome org>]

commit 1540c5df8ebda8fd619be9b997ac054300e0a922
Author: Andre Klapper <a9016009 gmx de>
Date:   Tue Jan 16 14:03:44 2018 +0100

    Remove references to non-existing 'Music' menu item

 help/C/index.docbook |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)
---
diff --git a/help/C/index.docbook b/help/C/index.docbook
index 2d4255b..ca9fd3e 100644
--- a/help/C/index.docbook
+++ b/help/C/index.docbook
@@ -557,8 +557,7 @@
                        in the tags embedded on the tracks. <application>&app;</application> uses 
                        these tags to display the tracks in an organized manner.
                        <tip>
-                               <para>Tags can be modified by choosing <menuchoice><guimenu>
-                               Music</guimenu><guimenuitem>Properties</guimenuitem>
+                               <para>Tags can be modified by right-clicking, then 
choosing<guimenuitem>Properties</guimenuitem>
                                </menuchoice> and filling in the details on the window that appears.</para>
                        </tip>
                </para>