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

[Andre Klapper <aklapper src gnome org>]

commit 7ab2496452e17e2fc411536b344445bc04d3b188
Author: Andre Klapper <a9016009 gmx de>
Date:   Tue Jan 16 14:00:25 2018 +0100

    Remove references to non-existing 'Control' menu item

 help/C/index.docbook |   13 ++++---------
 1 files changed, 4 insertions(+), 9 deletions(-)
---
diff --git a/help/C/index.docbook b/help/C/index.docbook
index d33fdc5..2d4255b 100644
--- a/help/C/index.docbook
+++ b/help/C/index.docbook
@@ -437,8 +437,7 @@
     <title>Using &app;</title>
     <sect2 id="Playing">
       <title>Playing Music</title>
-      <para>To play a track, choose <menuchoice><guimenu>Control</guimenu>
-      <guimenuitem>Play</guimenuitem></menuchoice>, or select the track and 
+      <para>To play a track, select the track and 
       press the <guibutton>Play</guibutton> button on the toolbar, or simply 
       double-click on the track to start playing.
                </para>
@@ -473,8 +472,7 @@
         <para>The option <guibutton>Repeat</guibutton> makes the 
         <application>&app;</application> restart to play tracks from the 
         beginning of the list when it reach the last track.</para>
-        <para>To activate repeat, choose <menuchoice><guimenu>Control</guimenu>
-        <guimenuitem>Repeat</guimenuitem></menuchoice>, or press the button 
+        <para>To activate repeat, press the button 
         <guibutton>Repeat</guibutton> on the toolbar.
                        <screenshot>
                                <mediaobject>
@@ -492,8 +490,7 @@
         <title>Shuffle</title>
         <para>The option <guibutton>Shuffle</guibutton> makes the 
         <application>&app;</application> play tracks in a random order.</para>
-        <para>To activate shuffle, choose <menuchoice><guimenu>Control</guimenu>
-        <guimenuitem>Shuffle</guimenuitem></menuchoice>, or press the button 
+        <para>To activate shuffle, press the button 
         <guibutton>Shuffle</guibutton> on the toolbar.
                        <screenshot>
                                <mediaobject>
@@ -840,9 +837,7 @@
         <title>Read a podcast episode</title>
         <para>
                        To play a podcast episode, select the episode you want to read, and
-                       choose
-                       <menuchoice><guimenu>Control</guimenu><guimenuitem>Play</guimenuitem></menuchoice>;
-                       you can also press the button <guibutton>Play</guibutton>.</para>
+                       press the button <guibutton>Play</guibutton>.</para>
         <para>
                        The episode have to downloaded before to read it, see <xref 
linkend="podcast-episode-download"/> to know how to download a
                        podcast episode.