Delete Bazel BUILD overlay for kws streaming (#5909)
Delete Bazel BUILD overlay for kws streaming (#5909)

This is no longer used as we no longer support a Bazel build for the
Python bindings.
iree-org/iree,iree-org/iree,iree-org/iree,google/iree,iree-org/iree,google/iree,google/iree,google/iree,iree-org/iree,google/iree,iree-org/iree,google/iree,iree-org/iree,google/iree