slapos_jio: Drop zocial

master/bt5/slapos_jio/SkinTemplateItem/portal_skins/slapos_hal_json_style/zocial.min.css.xml

-<?xml version="1.0"?>
-<ZopeData>
-  <record id="1" aka="AAAAAAAAAAE=">
-    <pickle>
-      <global name="File" module="OFS.Image"/>
-    </pickle>
-    <pickle>
-      <dictionary>
-        <item>
-            <key> <string>__name__</string> </key>
-            <value> <string>zocial.min.css</string> </value>
-        </item>
-        <item>
-            <key> <string>content_type</string> </key>
-            <value> <string>text/css</string> </value>
-        </item>
-        <item>
-            <key> <string>precondition</string> </key>
-            <value> <string></string> </value>
-        </item>
-        <item>
-            <key> <string>title</string> </key>
-            <value> <string>zocial.min.css</string> </value>
-        </item>
-      </dictionary>
-    </pickle>
-  </record>
-</ZopeData>