[CI] Fix Connection time out in docker workflow

[furqaankhan]

Did you read the Contributor Guide?

• Yes, I have read the Contributor Rules and Contributor Development Guide

Is this PR related to a JIRA ticket?

• No:
  • this is a CI update. The PR name follows the format [CI] my subject

What changes were proposed in this PR?

• Remove fetching spark jars from archive.apache.org due to download limits https://infra.apache.org/infra-ban.html.
• Remove unused variable due to this change

How was this patch tested?

• Passed CI.

Did this PR include necessary documentation updates?

• No, this PR does not affect any public API so no need to change the documentation.