Remove icone for Virtual Device and Virtual Host

git-svn-id: http://svn.code.sf.net/p/itop/code/trunk@2533 a333f486-631f-4898-b8df-5754b55c2be0

datamodels/2.x/itop-virtualization-mgmt/datamodel.itop-virtualization-mgmt.xml

@@ -17,7 +17,7 @@
           </attributes>
         </naming>
         <display_template/>
-        <icon>images/application.png</icon>
+        <icon/>
         <reconciliation>
           <attributes>
             <attribute id="name"/>
@@ -137,7 +137,7 @@
           </attributes>
         </naming>
         <display_template/>
-        <icon>images/application.png</icon>
+        <icon/>
         <reconciliation>
           <attributes>
             <attribute id="name"/>