rm start_wrapper.sh, not useful

runtime/tests/start_wrapper.sh

@@ -1,16 +0,0 @@
-#!/bin/bash
-
-function usage {
-        echo "$0 [server-log]"
-        exit 1
-}
-
-server_log=$1
-
-if [ -z $server_log ]
-then
-    usage
-fi
-
-./start.sh $server_log >/dev/null 2>&1 &
-