erp5_core: Drop unused script

This is not used anywhere, and actually cannot be reused anywhere because
of hard-coded document identifiers.
It is too trivial to be worth salvaging, so drop it.

product/ERP5/bootstrap/erp5_core/SkinTemplateItem/portal_skins/erp5_core/Base_exchangeRelatedObject.py

-# this script is intended to repair errors.
-# Let's say you use 2 objects, but this is the same one duplicated.
-# So you want to keep only one object, so you have to remove
-# all links to this old object and set the link on the new object.
-from_object = context.organisation['314']
-to_object = context.person['121']
-
-from_object_related_object_list = context.portal_categories.getRelatedValueList(from_object)
-for object in from_object_related_object_list:
-  print object.getDestinationSection()
-  object.setDestinationSectionValue(to_object)
-  object.recursiveImmediateReindexObject()
-return printed

product/ERP5/bootstrap/erp5_core/SkinTemplateItem/portal_skins/erp5_core/Base_exchangeRelatedObject.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></string> </value>
-        </item>
-        <item>
-            <key> <string>id</string> </key>
-            <value> <string>Base_exchangeRelatedObject</string> </value>
-        </item>
-      </dictionary>
-    </pickle>
-  </record>
-</ZopeData>