remove launch config drift plugin

Author: mmcgarr

Dockerfile

@@ -5,8 +5,7 @@ RUN set -eux; \
   apt-get install -y --no-install-recommends \
     # required by plugin/spot_termination.sh
     curl \
-    # required by plugin/launch_config_drift.sh
-    awscli \
+    # required by plugin/local_dns_resolver.sh
     jq \
     # required by local_dns_resolver.sh and upstream_dns_resolver.sh plugins
     dnsutils \