Remove unneeded repositories that fail to get downloaded correctly. Some of
this has been done upstream, but not yet released:
https://github.com/tensorflow/tensorflow/commit/6a6071412a2fd19ec9b23f2cc3e2c9d5e20a9c45

diff --git a/WORKSPACE b/WORKSPACE
index ea741c31..454e201a 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -29,25 +29,6 @@ load("//third_party/toolchains/preconfig/generate:archives.bzl",

 bazel_toolchains_archive()

-load(
-    "@bazel_toolchains//repositories:repositories.bzl",
-    bazel_toolchains_repositories = "repositories",
-)
-
-bazel_toolchains_repositories()
-
-load(
-    "@io_bazel_rules_docker//repositories:repositories.bzl",
-    container_repositories = "repositories",
-)
-
-container_repositories()
-
-load("//third_party/toolchains/preconfig/generate:workspace.bzl",
-     "remote_config_workspace")
-
-remote_config_workspace()
-
 # Use `swift_rules_dependencies` to fetch the toolchains. With the
 # `git_repository` rules above, the following call will skip redefining them.
 load("@build_bazel_rules_swift//swift:repositories.bzl", "swift_rules_dependencies")
@@ -142,10 +123,6 @@ load(

 apple_support_dependencies()

-load("@upb//bazel:repository_defs.bzl", "bazel_version_repository")
-
-bazel_version_repository(name = "bazel_version")
-
 load("//third_party/googleapis:repository_rules.bzl", "config_googleapis")

 config_googleapis()
diff --git a/third_party/toolchains/preconfig/generate/workspace.bzl b/third_party/toolchains/preconfig/generate/workspace.bzl
deleted file mode 100644
index 81b57dfa..00000000
--- a/third_party/toolchains/preconfig/generate/workspace.bzl
+++ /dev/null
@@ -1,77 +0,0 @@
-load(
-    "@io_bazel_rules_docker//repositories:repositories.bzl",
-    container_repositories = "repositories",
-)
-load(
-    "@io_bazel_rules_docker//container:container.bzl",
-    "container_pull",
-)
-load(":containers.bzl", "container_digests")
-
-def _remote_config_workspace():
-    container_repositories()
-
-    container_pull(
-        name = "centos6",
-        registry = "gcr.io",
-        repository = "tensorflow-testing/nosla-centos6",
-        digest = container_digests["centos6"],
-    )
-
-    container_pull(
-        name = "ubuntu16.04",
-        registry = "gcr.io",
-        repository = "tensorflow-testing/nosla-ubuntu16.04",
-        digest = container_digests["ubuntu16.04"],
-    )
-
-    container_pull(
-        name = "cuda10.0-cudnn7-ubuntu14.04",
-        registry = "gcr.io",
-        repository = "tensorflow-testing/nosla-cuda10.0-cudnn7-ubuntu14.04",
-        digest = container_digests["cuda10.0-cudnn7-ubuntu14.04"],
-    )
-
-    container_pull(
-        name = "cuda10.0-cudnn7-centos6",
-        registry = "gcr.io",
-        repository = "tensorflow-testing/nosla-cuda10.0-cudnn7-centos6",
-        digest = container_digests["cuda10.0-cudnn7-centos6"],
-    )
-
-    container_pull(
-        name = "cuda10.1-cudnn7-centos6",
-        registry = "gcr.io",
-        repository = "tensorflow-testing/nosla-cuda10.1-cudnn7-centos6",
-        digest = container_digests["cuda10.1-cudnn7-centos6"],
-    )
-
-    container_pull(
-        name = "ubuntu16.04-manylinux2010",
-        registry = "gcr.io",
-        repository = "tensorflow-testing/nosla-ubuntu16.04-manylinux2010",
-        digest = container_digests["ubuntu16.04-manylinux2010"],
-    )
-
-    container_pull(
-        name = "cuda10.0-cudnn7-ubuntu16.04-manylinux2010",
-        registry = "gcr.io",
-        repository = "tensorflow-testing/nosla-cuda10.0-cudnn7-ubuntu16.04-manylinux2010",
-        digest = container_digests["cuda10.0-cudnn7-ubuntu16.04-manylinux2010"],
-    )
-
-    container_pull(
-        name = "cuda10.1-cudnn7-ubuntu16.04-manylinux2010",
-        registry = "gcr.io",
-        repository = "tensorflow-testing/nosla-cuda10.1-cudnn7-ubuntu16.04-manylinux2010",
-        digest = container_digests["cuda10.1-cudnn7-ubuntu16.04-manylinux2010"],
-    )
-
-    container_pull(
-        name = "rocm-ubuntu16.04",
-        registry = "gcr.io",
-        repository = "tensorflow-testing/nosla-rocm-ubuntu16.04",
-        digest = container_digests["rocm-ubuntu16.04"],
-    )
-
-remote_config_workspace = _remote_config_workspace