remove imagestreams which are not GA (#231) #175

Job	Run time
build-and-push (10.11/Dockerfile.c9s, sclorg, QUAY_IMAGE_SCLORG_BUILDER_USERNAME, QUAY_IMAGE_SCLO...	54s
build-and-push (10.11/Dockerfile.c8s, sclorg, QUAY_IMAGE_SCLORG_BUILDER_USERNAME, QUAY_IMAGE_SCLO...	1m 18s
build-and-push (10.5/Dockerfile.c9s, sclorg, QUAY_IMAGE_SCLORG_BUILDER_USERNAME, QUAY_IMAGE_SCLOR...	1m 6s
build-and-push (10.5/Dockerfile.c8s, sclorg, QUAY_IMAGE_SCLORG_BUILDER_USERNAME, QUAY_IMAGE_SCLOR...	57s
build-and-push (10.3/Dockerfile.c8s, sclorg, QUAY_IMAGE_SCLORG_BUILDER_USERNAME, QUAY_IMAGE_SCLOR...	55s
build-and-push (10.5/Dockerfile.fedora, fedora, QUAY_IMAGE_FEDORA_BUILDER_USERNAME, QUAY_IMAGE_FE...	1m 12s
build-and-push (10.11/Dockerfile.fedora, fedora, QUAY_IMAGE_FEDORA_BUILDER_USERNAME, QUAY_IMAGE_F...	12s
	6m 34s

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