use "NoPruner" pruning method

scripts/runner.pl

@@ -180,6 +180,7 @@ sub import_trace {
       (
         "$fail_prune",    "--database-option-file $remote_db_conf",
         "-v $experiment", "-b %%",
+        '-p NoPruner',
         "--overwrite",    ">$remote_builds_dir/$experiment/2_prune.log"
       );
     say "Prune command: $prune_command";