Revert "ARROW-9223: [Python] Propagate timezone information in pandas conversion"

[wesm]

This reverts commit f86c4db.

[github-actions]

Thanks for opening a pull request!

Could you open an issue for this pull request on JIRA?
https://issues.apache.org/jira/browse/ARROW

Then could you also rename pull request title in the following format?

ARROW-${JIRA_ID}: [${COMPONENT}] ${SUMMARY}

See also:

• Other pull requests
• Contribution Guidelines - How to contribute patches

[emkornfield]

I don't think we should revert this fully. This also fixes a bug with as_datetime flag. Per mailing list discussion let me see if I can get round trip this evening

[wesm]

OK. I won't be able to spend any time on it for several days at least

[emkornfield]

I'll work on it tonight and try to get something out one way or another. Enjoy your time off

[kszucs]

We may revert this reversion, but merging to be able to cut 1.0.0-RC2.

[BryanCutler]

Let's just verify the Spark tests pass after the reverting.

@ursabot crossbow submit test-conda-python-3.8-spark-master

[BryanCutler]

@ursabot crossbow submit test-conda-python-3.8-spark-master

[ursabot]

AMD64 Conda Crossbow Submit (#120385) builder failed.

Revision: 12840af

Clone Arrow: update (failure) step's stderr:

Cloning into '.'...
fatal: couldn't find remote ref refs/pull/7802/merge

[BryanCutler]

@kszucs is there a way to kick off Spark integration tests right now on master?

[kszucs]

@BryanCutler I already submitted them, the spark tests are still running https://github.com/ursa-labs/crossbow/branches/all?query=build-871

[kszucs]

@BryanCutler seems like the spark tests are passing with the current master.

[BryanCutler]

great, thanks @kszucs !