slapos_pdm: drop UpgradeDecision_getAggregateValue

master/bt5/slapos_pdm/SkinTemplateItem/portal_skins/slapos_pdm/UpgradeDecision_getAggregateValue.py

-document_list = []
-for decision_line in context.contentValues():
-  try:
-    document_list.extend(
-      decision_line.getAggregateValueList(portal_type=document_portal_type))
-  except:
-    raise ValueError(context)
-
-if len(document_list) > 1: 
-  raise ValueError("It is only allowed to have more them 1 %s" % document_list)
-
-if len(document_list) == 0:
-  return None
-
-return document_list[0]

master/bt5/slapos_pdm/SkinTemplateItem/portal_skins/slapos_pdm/UpgradeDecision_getAggregateValue.xml

-<?xml version="1.0"?>
-<ZopeData>
-  <record id="1" aka="AAAAAAAAAAE=">
-    <pickle>
-      <global name="PythonScript" module="Products.PythonScripts.PythonScript"/>
-    </pickle>
-    <pickle>
-      <dictionary>
-        <item>
-            <key> <string>_bind_names</string> </key>
-            <value>
-              <object>
-                <klass>
-                  <global name="_reconstructor" module="copy_reg"/>
-                </klass>
-                <tuple>
-                  <global name="NameAssignments" module="Shared.DC.Scripts.Bindings"/>
-                  <global name="object" module="__builtin__"/>
-                  <none/>
-                </tuple>
-                <state>
-                  <dictionary>
-                    <item>
-                        <key> <string>_asgns</string> </key>
-                        <value>
-                          <dictionary>
-                            <item>
-                                <key> <string>name_container</string> </key>
-                                <value> <string>container</string> </value>
-                            </item>
-                            <item>
-                                <key> <string>name_context</string> </key>
-                                <value> <string>context</string> </value>
-                            </item>
-                            <item>
-                                <key> <string>name_m_self</string> </key>
-                                <value> <string>script</string> </value>
-                            </item>
-                            <item>
-                                <key> <string>name_subpath</string> </key>
-                                <value> <string>traverse_subpath</string> </value>
-                            </item>
-                          </dictionary>
-                        </value>
-                    </item>
-                  </dictionary>
-                </state>
-              </object>
-            </value>
-        </item>
-        <item>
-            <key> <string>_params</string> </key>
-            <value> <string>document_portal_type="Instance Tree"</string> </value>
-        </item>
-        <item>
-            <key> <string>id</string> </key>
-            <value> <string>UpgradeDecision_getAggregateValue</string> </value>
-        </item>
-      </dictionary>
-    </pickle>
-  </record>
-</ZopeData>