remove build.sh

This script was used by Travis CI which got disabled in
a4e03ffd07 in favor of GitHub Workflows.
Developers should use `make` instead of this script.

Firmware/build.sh

@@ -1,27 +0,0 @@
-#!/usr/bin/env bash
-# Builds the firmware with the configuration specified by
-# environment variables named CONFIG_...
-# If DEPLOY is set, the deliverables are copied to Firmware/deploy/*
-# with the suffix $DEPLOY
-set -euo pipefail
-
-THIS_DIR="$(dirname "$0")"
-cd "$THIS_DIR"
-
-# Treat warnings as errors
-export CONFIG_STRICT=true
-
-# Write all environment variables that start with "CONFIG_" to tup.config
-rm -rdf build
-mkdir -p build
-env | grep ^CONFIG > tup.config
-tup init
-tup generate ./tup_build.sh
-bash -xe ./tup_build.sh
-
-# Deploy
-if ! [ -z ${DEPLOY+x} ]; then
-    mkdir -p deploy
-    cp build/ODriveFirmware.elf deploy/ODriveFirmware_"$DEPLOY".elf
-    cp build/ODriveFirmware.hex deploy/ODriveFirmware_"$DEPLOY".hex
-fi