removed unneeded launch file and Dockerfile change

Signed-off-by: Jessica Mack <jmack@redhat.com>

tools/ansible/roles/dockerfile/files/launch_awx_cache_clear.sh

@@ -1,22 +0,0 @@
-#!/usr/bin/env bash
-if [ `id -u` -ge 500 ]; then
-    echo "awx:x:`id -u`:`id -g`:,,,:/var/lib/awx:/bin/bash" >> /tmp/passwd
-    cat /tmp/passwd > /etc/passwd
-    rm /tmp/passwd
-fi
-
-if [ -n "${AWX_KUBE_DEVEL}" ]; then
-    pushd /awx_devel
-    make awx-link
-    popd
-
-    export SDB_NOTIFY_HOST=$MY_POD_IP
-fi
-
-set -e
-
-wait-for-migrations
-
-awx-manage provision_instance
-
-exec supervisord -c /etc/supervisord_task.conf