Revert "Add armv6 docker image (#6605)"

This reverts commit 6ba85656.
Signed-off-by: NSimon Pasquier <spasquie@redhat.com>

.dockerignore

@@ -3,7 +3,6 @@ data/
 .tarballs/
 
 !.build/linux-amd64/
-!.build/linux-armv6/
 !.build/linux-armv7/
 !.build/linux-arm64/
 !.build/linux-s390x/

Makefile

@@ -12,7 +12,7 @@
 # limitations under the License.
 
 # Needs to be defined before including Makefile.common to auto-generate targets
-DOCKER_ARCHS ?= amd64 armv6 armv7 arm64 s390x
+DOCKER_ARCHS ?= amd64 armv7 arm64 s390x
 
 REACT_APP_PATH = web/ui/react-app
 REACT_APP_SOURCE_FILES = $(wildcard $(REACT_APP_PATH)/public/* $(REACT_APP_PATH)/src/* $(REACT_APP_PATH)/tsconfig.json)