remove unused make targets

Change-Id: I04dd9093be29366926fc42de21c24989f5f60e95
diff --git a/Makefile b/Makefile
index 14196ce..d846a5a 100644
--- a/Makefile
+++ b/Makefile
@@ -23,8 +23,6 @@
 	docker-release \
 	docker-image \
 	docker-shell \
-	download-raspbian-latest \
-	download-raspbian-lite-latest \
 	clean
 
 url_effective = $(shell curl -LIs -o /dev/null -w %{url_effective} $(1))
@@ -34,17 +32,12 @@
 	@echo "make docker-release"
 	@echo "make docker-image"
 	@echo "make docker-shell"
-	@echo "make download-raspbian-latest"
-	@echo "make download-raspbian-lite-latest"
 	@echo "make clean"
 
 # Docker helpers
 docker-image:
 	docker build -t $(DOCKER_IMAGE) scripts
 
-docker-image-remove:
-	docker rmi $(DOCKER_IMAGE)
-
 docker-shell: docker-image
 	docker run --rm --privileged --interactive --tty --workdir /aiy \
 		--volume $(MAKEFILE_DIR):/aiy $(DOCKER_IMAGE) /bin/bash
@@ -56,13 +49,6 @@
 docker-release: docker-image
 	BUILD_ENGINE=docker scripts/build.sh $(OUT_DIR) "coralkit"
 
-# Downloads
-download-raspbian-latest:
-	curl -O $(call url_effective,https://downloads.raspberrypi.org/raspbian_latest)
-
-download-raspbian-lite-latest:
-	curl -O $(call url_effective,https://downloads.raspberrypi.org/raspbian_lite_latest)
-
 # Clean
 clean:
 	rm -rf $(OUT_DIR)
diff --git a/scripts/build.sh b/scripts/build.sh
index 8cd42ec..1a923cc 100755
--- a/scripts/build.sh
+++ b/scripts/build.sh
@@ -23,6 +23,7 @@
 readonly OUT_DIR="$1"
 readonly NAME="$2"
 
+# Should be updated to the latest from https://downloads.raspberrypi.org/raspios_full_armhf/images/
 readonly RASPBIAN_IMAGE_URL=${RASPBIAN_IMAGE_URL:-https://downloads.raspberrypi.org/raspios_armhf/images/raspios_armhf-2021-05-28/2021-05-07-raspios-buster-armhf.zip}
 readonly RASPBIAN_IMAGE=${RASPBIAN_IMAGE_URL##*/}
 readonly BUILD_ENGINE="${BUILD_ENGINE:-docker}"