tools/simulator: Remove superseded build script for sim docker (#32546)

* remove

* add those back
old-commit-hash: d6a738bef7

tools/sim/build_container.sh

@@ -1,10 +0,0 @@
-#!/bin/bash
-
-DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
-cd $DIR/../../
-
-docker pull ghcr.io/commaai/openpilot-base:latest
-docker build \
-  --cache-from ghcr.io/commaai/openpilot-sim:latest \
-  -t ghcr.io/commaai/openpilot-sim:latest \
-  -f tools/sim/Dockerfile.sim .