Remove HB incorrect setting of ATTR_DD1_SLOW_PCI_REF_CLOCK

Change-Id: I306fbb6ce0a128f61fc58aa4ed10ac53470eeb90
CQ:SW403259
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/46988
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: HWSV CI <hwsv-ci+hostboot@us.ibm.com>
Tested-by: PPE CI <ppe-ci+hostboot@us.ibm.com>
Tested-by: Hostboot CI <hostboot-ci+hostboot@us.ibm.com>
Reviewed-by: Joseph J. McGill <jmcgill@us.ibm.com>
Reviewed-by: Sachin Gupta <sgupta2m@in.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>
Reviewed-by: Jennifer A. Stofer <stofer@us.ibm.com>
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/47068
Reviewed-by: Hostboot Team <hostboot@us.ibm.com>
Tested-by: Jenkins OP Build CI <op-jenkins+hostboot@us.ibm.com>

src/import/hwpf/fapi2/xml/attribute_info/hb_temp_defaults.xml

@@ -160,10 +160,6 @@
         <id>ATTR_PROC_EFF_FABRIC_CHIP_ID</id>
         <default>0x0</default>
      </attribute>
-     <attribute>
-        <id>ATTR_DD1_SLOW_PCI_REF_CLOCK</id>
-        <default>0x01</default>
-     </attribute>
     <attribute>
         <id>ATTR_AUX_FUNC_INVOCATION_TIME_MS</id>
         <default>0x01</default>