slapos_accounting: drop SlapOSAccountingSystemPreference

master/bt5/slapos_accounting/PropertySheetTemplateItem/portal_property_sheets/SlapOSAccountingSystemPreference.xml

-<?xml version="1.0"?>
-<ZopeData>
-  <record id="1" aka="AAAAAAAAAAE=">
-    <pickle>
-      <global name="Property Sheet" module="erp5.portal_type"/>
-    </pickle>
-    <pickle>
-      <dictionary>
-        <item>
-            <key> <string>_count</string> </key>
-            <value>
-              <persistent> <string encoding="base64">AAAAAAAAAAI=</string> </persistent>
-            </value>
-        </item>
-        <item>
-            <key> <string>_mt_index</string> </key>
-            <value>
-              <persistent> <string encoding="base64">AAAAAAAAAAM=</string> </persistent>
-            </value>
-        </item>
-        <item>
-            <key> <string>_tree</string> </key>
-            <value>
-              <persistent> <string encoding="base64">AAAAAAAAAAQ=</string> </persistent>
-            </value>
-        </item>
-        <item>
-            <key> <string>description</string> </key>
-            <value>
-              <none/>
-            </value>
-        </item>
-        <item>
-            <key> <string>id</string> </key>
-            <value> <string>SlapOSAccountingSystemPreference</string> </value>
-        </item>
-        <item>
-            <key> <string>portal_type</string> </key>
-            <value> <string>Property Sheet</string> </value>
-        </item>
-      </dictionary>
-    </pickle>
-  </record>
-  <record id="2" aka="AAAAAAAAAAI=">
-    <pickle>
-      <global name="Length" module="BTrees.Length"/>
-    </pickle>
-    <pickle> <int>0</int> </pickle>
-  </record>
-  <record id="3" aka="AAAAAAAAAAM=">
-    <pickle>
-      <global name="OOBTree" module="BTrees.OOBTree"/>
-    </pickle>
-    <pickle>
-      <none/>
-    </pickle>
-  </record>
-  <record id="4" aka="AAAAAAAAAAQ=">
-    <pickle>
-      <global name="OOBTree" module="BTrees.OOBTree"/>
-    </pickle>
-    <pickle>
-      <none/>
-    </pickle>
-  </record>
-</ZopeData>

master/bt5/slapos_accounting/bt/template_property_sheet_id_list

@@ -6,7 +6,6 @@ SlapOSAccountingSaleInvoiceTransactionConstraint
 SlapOSAccountingSalePackingListConstraint
 SlapOSAccountingSalePackingListLineConstraint
 SlapOSAccountingSaleTradeConditionConstraint
-SlapOSAccountingSystemPreference
 SlapOSCloudContractAccounting
 SlapOSCloudContractLineAccounting
 SlapOSLedgerConstraint