Do not provide a count_method by default.

Counting all documents matching some criterion has a cost proportional to
the number of those documents. Modules grow large easily (the effect
becomes quite noticeable from ~50k), and this information costs too much.

product/ERP5/bootstrap/erp5_core/SkinTemplateItem/portal_skins/erp5_core/Base_viewFieldLibrary/my_view_mode_module_listbox.xml

@@ -350,9 +350,7 @@
                 </item>
                 <item>
                     <key> <string>count_method</string> </key>
-                    <value>
-                      <persistent> <string encoding="base64">AAAAAAAAAAQ=</string> </persistent>
-                    </value>
+                    <value> <string></string> </value>
                 </item>
                 <item>
                     <key> <string>css_class</string> </key>
@@ -417,7 +415,7 @@
                 <item>
                     <key> <string>list_method</string> </key>
                     <value>
-                      <persistent> <string encoding="base64">AAAAAAAAAAU=</string> </persistent>
+                      <persistent> <string encoding="base64">AAAAAAAAAAQ=</string> </persistent>
                     </value>
                 </item>
                 <item>
@@ -535,19 +533,6 @@
     </pickle>
   </record>
   <record id="4" aka="AAAAAAAAAAQ=">
-    <pickle>
-      <global name="Method" module="Products.Formulator.MethodField"/>
-    </pickle>
-    <pickle>
-      <dictionary>
-        <item>
-            <key> <string>method_name</string> </key>
-            <value> <string>countFolder</string> </value>
-        </item>
-      </dictionary>
-    </pickle>
-  </record>
-  <record id="5" aka="AAAAAAAAAAU=">
     <pickle>
       <global name="Method" module="Products.Formulator.MethodField"/>
     </pickle>