bug 309579: Organize build items in context menu

removed Build All Configurations item which did not appear in the menu (neither in CDT 5.0 nor in 6.0)

build/org.eclipse.cdt.managedbuilder.ui/plugin.xml

@@ -150,36 +150,6 @@
         </visibility>
      </objectContribution>
    </extension>
-  <extension
-        point="org.eclipse.ui.actionSets">
-     <actionSet
-           id="org.eclipse.cdt.managedbuilder.ui.BuildAllActionSet"
-           label="%BuildCfgMenu.label">
-<!-- Note: The menu (re-) definition has to be here due to bug: -->
-<!-- https://bugs.eclipse.org/bugs/show_bug.cgi?id=15670  -->
-        <menu
-              id="org.eclipse.cdt.ui.prjmenu"
-              label="%Configurations.menu"
-              path="project/build">
-           <groupMarker
-                 name="gm1">
-           </groupMarker>
-           <separator
-                 name="s2">
-           </separator>
-           <groupMarker
-                 name="gm2">
-           </groupMarker>
-        </menu>
-        <action
-              class="org.eclipse.cdt.managedbuilder.internal.ui.actions.BuildAllAction"
-              enablesFor="+"
-              id="org.eclipse.cdt.managedbuilder.ui.buildAllAction0"
-              label="%BuildMenu.label"
-              menubarPath="project/org.eclipse.cdt.ui.prjmenu/gm1"
-              style="pulldown"/>
-     </actionSet>
-  </extension>
   <extension
         point="org.eclipse.ui.perspectiveExtensions">
      <perspectiveExtension targetID="org.eclipse.cdt.ui.CPerspective">