[devhelp] Window: remove unknown GMenuItem attributes

[Sébastien Wilmet <swilmet src gnome org>]

commit 4d9c830e400054b4cfddc9b334b9719279fbbdd1
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Sun Jan 28 18:46:41 2018 +0100

    Window: remove unknown GMenuItem attributes
    
    The documentation in GtkApplicationWindow doesn't document those
    attributes. And GMenuItem doesn't have functions to set those
    properties.

 src/dh-window.ui |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)
---
diff --git a/src/dh-window.ui b/src/dh-window.ui
index ec04a53..765cf4c 100644
--- a/src/dh-window.ui
+++ b/src/dh-window.ui
@@ -6,7 +6,6 @@
       <item>
         <attribute name="label" translatable="yes">Side _Panel</attribute>
         <attribute name="action">win.show-sidebar</attribute>
-        <attribute name="use-underline">True</attribute>
       </item>
     </section>
     <section>
@@ -45,7 +44,6 @@
       <item>
         <attribute name="label" translatable="yes">_Side Panel</attribute>
         <attribute name="action">win.show-sidebar</attribute>
-        <attribute name="stateful">true</attribute>
       </item>
     </section>
     <section>