[SPARK-35620][BUILD][PYTHON] Remove documentation build in Python linter

[HyukjinKwon]

What changes were proposed in this pull request?

This PR proposes to remove PySpark documentation build in linter check because:

• to speed up CI build by removing duplicate documentation build (linter and doc build)
• for [SPARK-35587][PYTHON][DOCS] Initial porting of Koalas documentation #32726. With this PR PySpark documentation build requires a full Spark build to generate plot images in PySpark documentation. It makes less sense to require it in Python linter.
• to remove unnecessary dependency installation for Python linter in CI

Why are the changes needed?

Python linter script includes documentation build. Because of this, we run documentation builds duplicately in CI, and requires unnecessary dependencies to be installed, and takes extra time. It would more make sense to exclude this in Python linter.

Does this PR introduce any user-facing change?

No, dev-only.

How was this patch tested?

Manually tested, and it will be tested in CI.

[HyukjinKwon]

cc @dongjoon-hyun @srowen FYI

[itholic]

Looks fine to me if test passes.

Excluding the doc build from linter makes sense to me.

[SparkQA]

Kubernetes integration test unable to build dist.

exiting with code: 1
URL: https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder-K8s/43781/

[HyukjinKwon]

Thanks @itholic and @srowen.

Merged to master.

[SparkQA]

Test build #139257 has finished for PR 32760 at commit ae2e5c5.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

[dongjoon-hyun]

+1, late LGTM. Thanks!