WIP [SPARK-12172][SPARKR] Remove internal-only RDD methods

[felixcheung]

What changes were proposed in this pull request?

Remove non-public internal only methods for RDD in SparkR

How was this patch tested?

Jenkins

[SparkQA]

Test build #98148 has finished for PR 22866 at commit b16de30.

• This patch fails some tests.
• This patch merges cleanly.
• This patch adds no public classes.

[SparkQA]

Test build #98149 has finished for PR 22866 at commit 78f47e8.

• This patch fails some tests.
• This patch merges cleanly.
• This patch adds no public classes.

[SparkQA]

Test build #98150 has finished for PR 22866 at commit ba37a8a.

• This patch fails some tests.
• This patch merges cleanly.
• This patch adds no public classes.

[SparkQA]

Test build #98152 has finished for PR 22866 at commit 6fc37f2.

• This patch fails SparkR unit tests.
• This patch merges cleanly.
• This patch adds no public classes.

[SparkQA]

Test build #98153 has finished for PR 22866 at commit 00ae00a.

• This patch fails SparkR unit tests.
• This patch merges cleanly.
• This patch adds no public classes.

[SparkQA]

Test build #98703 has finished for PR 22866 at commit d1f622e.

• This patch fails to build.
• This patch merges cleanly.
• This patch adds no public classes.

[srowen]

I trust your judgment on this one.

[felixcheung]

thx, but DO NOT MERGE - there's some nasty bug I'm still investigating..

[srowen]

@felixcheung where did you end up on this one?

[felixcheung]

sorry, didn't get a chance to follow up. Since this is a big change, I might need to revert part of it to see what is leading to some implicit type conversion type of problem, IIRC. I will try to get back in a week.

[dongjoon-hyun]

Hi, @felixcheung . Do you think we can have this at 3.0.0~?

[github-actions]

We're closing this PR because it hasn't been updated in a while. This isn't a judgement on the merit of the PR in any way. It's just a way of keeping the PR queue manageable.
If you'd like to revive this PR, please reopen it and ask a committer to remove the Stale tag!