Remove external script reference to support defered execution

Remove the hard-coded external script both because it is not needed
and because defer mode produces list output files directly.

policy/list-path-external

@@ -8,7 +8,7 @@ define(access_age,
   (DAYS(CURRENT_TIMESTAMP) - DAYS(ACCESS_TIME))
 )
 
-RULE 'gather-exec' EXTERNAL LIST 'gather-info' EXEC '/data/rc/gpfs-policy/gather-info.sh' OPTS 'JOBID' ESCAPE '%'
+RULE 'gather-exec' EXTERNAL LIST 'gather-info' EXEC '' OPTS 'JOBID' ESCAPE '%'
 RULE 'list-path' LIST 'gather-info'
   SHOW ('|size='   || varchar(FILE_SIZE) ||
         '|kballoc='|| varchar(KB_ALLOCATED) ||