[krb5-auth-dialog] help: Remove tray icon related preference

[Guido Günther <guidog src gnome org>]

commit 64138858c7029c38c88cbbbdfd54b3b0c421beda
Author: Guido Günther <agx sigxcpu org>
Date:   Sun Feb 14 16:34:09 2021 +0100

    help: Remove tray icon related preference
    
    The tray icon got removed in 8eb42cb89d145d93af1396fc4b6cdaae6730f625

 help/C/index.docbook | 10 ----------
 1 file changed, 10 deletions(-)
---
diff --git a/help/C/index.docbook b/help/C/index.docbook
index f6fe0eb..82864b8 100644
--- a/help/C/index.docbook
+++ b/help/C/index.docbook
@@ -308,16 +308,6 @@
               <para>Notifications that your credentials are about to expire will be sent that many minutes 
before expiry.</para>
             </entry>
           </row>
-          <row>
-            <entry colsep="0" rowsep="0" valign="top">
-              <para>
-                <guilabel>Show tray icon</guilabel>
-              </para>
-            </entry>
-            <entry colsep="0" rowsep="0" valign="top">
-              <para>Whether to show the tray icon. Disabling the tray icon will also disable notifications, 
the password dialog will be brought up instead.</para>
-            </entry>
-          </row>
        </tbody>
       </tgroup>
     </table>