slapos_pdm: Remove useless script not used anyware

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

-portal = context.getPortalObject()
-
-notification_message = portal.portal_notifications.getDocumentValue(
-                 reference='slapos-upgrade-computer.notification')
-
-title = "New Software available for Installation at %s" % computer.getTitle()
-mapping_dict = {'software_product_title': software_product_title,
-                'computer_title': computer.getTitle(),
-                'computer_reference': computer.getReference(),
-                'software_release_name': software_release.getTitle(),
-                'software_release_reference': software_release.getReference(),
-                'upgrade_accept_link': 
-                  'Base_acceptUpgradeDecision?reference=%s' % reference,
-                'upgrade_reject_link':
-                  'Base_rejectUpgradeDecision?reference=%s' % reference,
-                'new_software_release_url': software_release.getUrlString(),
-               }
-
-
-if notification_message is not None:
-  message = notification_message.asEntireHTML(
-             substitution_method_parameter_dict={'mapping_dict': mapping_dict})
-else:
-  raise ValueError("No Notification Message")
-
-return title, message

master/bt5/slapos_pdm/SkinTemplateItem/portal_skins/slapos_pdm/UpgradeDecision_getComputerNotificationMessage.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>Script_magic</string> </key>
-            <value> <int>3</int> </value>
-        </item>
-        <item>
-            <key> <string>_bind_names</string> </key>
-            <value>
-              <object>
-                <klass>
-                  <global name="NameAssignments" module="Shared.DC.Scripts.Bindings"/>
-                </klass>
-                <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>computer</string> </value>
-        </item>
-        <item>
-            <key> <string>id</string> </key>
-            <value> <string>UpgradeDecision_getComputerNotificationMessage</string> </value>
-        </item>
-      </dictionary>
-    </pickle>
-  </record>
-</ZopeData>