remove unused ZSQL methods

bt5/erp5_trade/SkinTemplateItem/portal_skins/erp5_trade/Container_zGetTotal.xml

-<?xml version="1.0"?>
-<ZopeData>
-  <record id="1" aka="AAAAAAAAAAE=">
-    <pickle>
-      <global name="SQL" module="Products.ZSQLMethods.SQL"/>
-    </pickle>
-    <pickle>
-      <dictionary>
-        <item>
-            <key> <string>allow_simple_one_argument_traversal</string> </key>
-            <value>
-              <none/>
-            </value>
-        </item>
-        <item>
-            <key> <string>arguments_src</string> </key>
-            <value> <string>uid</string> </value>
-        </item>
-        <item>
-            <key> <string>cache_time_</string> </key>
-            <value> <int>0</int> </value>
-        </item>
-        <item>
-            <key> <string>class_file_</string> </key>
-            <value> <string></string> </value>
-        </item>
-        <item>
-            <key> <string>class_name_</string> </key>
-            <value> <string></string> </value>
-        </item>
-        <item>
-            <key> <string>connection_hook</string> </key>
-            <value>
-              <none/>
-            </value>
-        </item>
-        <item>
-            <key> <string>connection_id</string> </key>
-            <value> <string>erp5_sql_connection</string> </value>
-        </item>
-        <item>
-            <key> <string>id</string> </key>
-            <value> <string>Container_zGetTotal</string> </value>
-        </item>
-        <item>
-            <key> <string>max_cache_</string> </key>
-            <value> <int>100</int> </value>
-        </item>
-        <item>
-            <key> <string>max_rows_</string> </key>
-            <value> <int>1000</int> </value>
-        </item>
-        <item>
-            <key> <string>src</string> </key>
-            <value> <string encoding="cdata"><![CDATA[
-
-SELECT\n
-\tSUM(movement.quantity) AS total_quantity\n
-FROM\n
-\tcatalog AS container_cell, catalog AS container_line, movement\n
-WHERE\n
-\tmovement.explanation_uid = <dtml-sqlvar getDeliveryUid type="int">\n
-  AND\n
-  ((\n
-    container_cell.parent_uid = container_line.uid \n
-    AND container_line.parent_uid = <dtml-sqlvar uid type="int">\n
-    AND movement.uid = container_cell.uid\n
-    AND container_cell.portal_type = "Container Cell"\n
-  )\n
-  OR\n
-  (\n
-    container_line.parent_uid = <dtml-sqlvar uid type="int">\n
-    AND container_line.uid = container_cell.uid\n
-    AND movement.uid = container_cell.uid\n
-    AND container_cell.has_cell_content = 0\n
-    AND container_line.portal_type = "Container Line"\n
-  ))\n
-  AND container_cell.portal_type <> "Container"\n
-
-
-]]></string> </value>
-        </item>
-        <item>
-            <key> <string>title</string> </key>
-            <value> <string></string> </value>
-        </item>
-      </dictionary>
-    </pickle>
-  </record>
-</ZopeData>

bt5/erp5_trade/SkinTemplateItem/portal_skins/erp5_trade/DeliveryLine_zGetRelatedQuantity.xml

-<?xml version="1.0"?>
-<ZopeData>
-  <record id="1" aka="AAAAAAAAAAE=">
-    <pickle>
-      <global name="SQL" module="Products.ZSQLMethods.SQL"/>
-    </pickle>
-    <pickle>
-      <dictionary>
-        <item>
-            <key> <string>allow_simple_one_argument_traversal</string> </key>
-            <value>
-              <none/>
-            </value>
-        </item>
-        <item>
-            <key> <string>arguments_src</string> </key>
-            <value> <string>uid</string> </value>
-        </item>
-        <item>
-            <key> <string>cache_time_</string> </key>
-            <value> <int>0</int> </value>
-        </item>
-        <item>
-            <key> <string>class_file_</string> </key>
-            <value> <string>ZSQLCatalog.zsqlbrain</string> </value>
-        </item>
-        <item>
-            <key> <string>class_name_</string> </key>
-            <value> <string>ZSQLBrain</string> </value>
-        </item>
-        <item>
-            <key> <string>connection_hook</string> </key>
-            <value> <string></string> </value>
-        </item>
-        <item>
-            <key> <string>connection_id</string> </key>
-            <value> <string>erp5_sql_connection</string> </value>
-        </item>
-        <item>
-            <key> <string>id</string> </key>
-            <value> <string>DeliveryLine_zGetRelatedQuantity</string> </value>
-        </item>
-        <item>
-            <key> <string>max_cache_</string> </key>
-            <value> <int>100</int> </value>
-        </item>
-        <item>
-            <key> <string>max_rows_</string> </key>
-            <value> <int>1000</int> </value>
-        </item>
-        <item>
-            <key> <string>src</string> </key>
-            <value> <string encoding="cdata"><![CDATA[
-
-SELECT\n
-  SUM(movement.quantity) AS quantity\n
-FROM\n
-  category, movement\n
-WHERE\n
-  category.category_uid = <dtml-sqlvar uid type="int">\n
-AND\n
-  category.uid = movement.uid\n
-AND\n
-  category.base_category_uid = <dtml-sqlvar expr="portal_categories.delivery.getUid()" type="int">\n
-
-
-]]></string> </value>
-        </item>
-        <item>
-            <key> <string>title</string> </key>
-            <value> <string></string> </value>
-        </item>
-      </dictionary>
-    </pickle>
-  </record>
-</ZopeData>