[meld] Remove "Help" button from new diff UI

[Kai Willadsen <kaiw src gnome org>]

commit e680447864b742fd53605048d0557331f52dc6a2
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Sun Jul 4 12:08:28 2021 +1000

    Remove "Help" button from new diff UI
    
    This has never been hooked up to anything.

 meld/resources/ui/new-diff-tab.ui | 19 ++-----------------
 1 file changed, 2 insertions(+), 17 deletions(-)
---
diff --git a/meld/resources/ui/new-diff-tab.ui b/meld/resources/ui/new-diff-tab.ui
index fb81eec3..69626ac4 100644
--- a/meld/resources/ui/new-diff-tab.ui
+++ b/meld/resources/ui/new-diff-tab.ui
@@ -442,21 +442,6 @@
             <property name="visible">True</property>
             <property name="can-focus">False</property>
             <property name="spacing">6</property>
-            <child>
-              <object class="GtkButton" id="button_help">
-                <property name="label">gtk-help</property>
-                <property name="use_action_appearance">False</property>
-                <property name="can_focus">True</property>
-                <property name="receives_default">True</property>
-                <property name="use_stock">True</property>
-              </object>
-              <packing>
-                <property name="expand">False</property>
-                <property name="fill">False</property>
-                <property name="position">0</property>
-                <property name="secondary">True</property>
-              </packing>
-            </child>
             <property name="layout-style">end</property>
             <child>
               <object class="GtkButton" id="button_new_blank">
@@ -472,7 +457,7 @@
               <packing>
                 <property name="expand">False</property>
                 <property name="fill">False</property>
-                <property name="position">1</property>
+                <property name="position">0</property>
               </packing>
             </child>
             <child>
@@ -489,7 +474,7 @@
               <packing>
                 <property name="expand">False</property>
                 <property name="fill">False</property>
-                <property name="position">2</property>
+                <property name="position">1</property>
               </packing>
             </child>
           </object>