[bazel] Remove deprecated and now non-existent flag

[acxz]

Why are these changes needed?

Remove a deprecated (since bazel 0.5.3) and now unsupported (since bazel 2.0.0) build flag for bazel. (bazelbuild/bazel@9f9f5ec)

The original file/function that needed this flag that we are pulling from

ray/bazel/ray.bzl

Line 3 in f86e623

load("@bazel_common//tools/maven:pom_file.bzl", "pom_file")

has updated the function to use the proper syntax (i.e. to_list()) google/bazel-common@084aadd
As such it is safe to remove this deprecation flag.

Related issue number

Closes #7884
After removing this flag from the .bazelrc ray builds and installs successfully!

Checks

• I've run scripts/format.sh to lint the changes in this PR.
• I've included any doc changes needed for https://ray.readthedocs.io/en/latest/.
• I've made sure the tests are passing. Note that there might be a few flaky tests, see the recent failure rates at https://ray-travis-tracker.herokuapp.com/.
• Testing Strategy
  • Unit tests
  • Release tests
  • This PR is not tested (please justify below)

I have also made a commit to update the CI for using the version of pom_file.bzl which contains the fix.

[AmplabJenkins]

Can one of the admins verify this patch?

[AmplabJenkins]

Test PASSed.
Refer to this link for build results (access rights to CI server needed):
https://amplab.cs.berkeley.edu/jenkins//job/Ray-PRB/24175/
Test PASSed.

[devinbarry]

👍

[AmplabJenkins]

Test PASSed.
Refer to this link for build results (access rights to CI server needed):
https://amplab.cs.berkeley.edu/jenkins//job/Ray-PRB/24193/
Test PASSed.

[pcmoritz]

Looks great, thanks for the contribution! I'm rerunning the failed/flaky tests to make sure it is unrelated to the upgrade.

[acxz]

Just helping out where I can. Thank you guys for maintaining such an amazing project!