tests/docker: Remove the remainders of debian9 containers from the Makefile

The Debian 9 containers have been removed a while ago, so we can
delete the corresponding entries in the Makefile, too.

Fixes: e3755276 ("tests/docker: Remove old Debian 9 containers")
Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Wainer dos Santos Moschetta <wainersm@redhat.com>
Message-Id: <20201215083318.92205-1-thuth@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>

tests/docker/Makefile.include

@@ -11,8 +11,7 @@ HOST_ARCH = $(if $(ARCH),$(ARCH),$(shell uname -m))
 DOCKER_SUFFIX := .docker
 DOCKER_FILES_DIR := $(SRC_PATH)/tests/docker/dockerfiles
 # we don't run tests on intermediate images (used as base by another image)
-DOCKER_PARTIAL_IMAGES := debian9 debian10 debian11
-DOCKER_PARTIAL_IMAGES += debian9-mxe debian-bootstrap
+DOCKER_PARTIAL_IMAGES := debian10 debian11 debian-bootstrap
 DOCKER_IMAGES := $(sort $(notdir $(basename $(wildcard $(DOCKER_FILES_DIR)/*.docker))))
 DOCKER_TARGETS := $(patsubst %,docker-image-%,$(DOCKER_IMAGES))
 # Use a global constant ccache directory to speed up repetitive builds
@@ -96,7 +95,6 @@ docker-binfmt-image-debian-%: $(DOCKER_FILES_DIR)/debian-bootstrap.docker
 endif
 
 # Enforce dependencies for composite images
-docker-image-debian9-mxe: docker-image-debian9
 ifeq ($(HOST_ARCH),x86_64)
 docker-image-debian-amd64: docker-image-debian10
 DOCKER_PARTIAL_IMAGES += debian-amd64-cross
@@ -104,8 +102,6 @@ else
 docker-image-debian-amd64-cross: docker-image-debian10
 DOCKER_PARTIAL_IMAGES += debian-amd64
 endif
-docker-image-debian-win32-cross: docker-image-debian9-mxe
-docker-image-debian-win64-cross: docker-image-debian9-mxe
 
 # For non-x86 hosts not all cross-compilers have been packaged
 ifneq ($(HOST_ARCH),x86_64)