[SPARK-36239][PYTHON][DOCS] Remove some APIs from documentation

### What changes were proposed in this pull request?

This PR proposes removing some APIs from pandas-on-Spark documentation.

Because they can be easily workaround via Spark DataFrame or Column functions, so they might be removed In the future.

### Why are the changes needed?

Because we don't want to expose some functions as a public API.

### Does this PR introduce _any_ user-facing change?

The APIs such as `(Series|Index).spark.data_type`, `(Series|Index).spark.nullable`, `DataFrame.spark.schema`, `DataFrame.spark.print_schema`, `DataFrame.pandas_on_spark.attach_id_column`, `DataFrame.spark.checkpoint`, `DataFrame.spark.localcheckpoint` and `DataFrame.spark.explain` is removed in the documentation.

### How was this patch tested?

Manually build the documents.

Closes #33458 from itholic/SPARK-36239.

Authored-by: itholic <haejoon.lee@databricks.com>
Signed-off-by: Hyukjin Kwon <gurwls223@apache.org>

python/docs/source/reference/pyspark.pandas/frame.rst

@@ -276,20 +276,15 @@ in Spark. These can be accessed by ``DataFrame.spark.<function/property>``.
 .. autosummary::
    :toctree: api/
 
-   DataFrame.spark.schema
-   DataFrame.spark.print_schema
    DataFrame.spark.frame
    DataFrame.spark.cache
    DataFrame.spark.persist
    DataFrame.spark.hint
    DataFrame.spark.to_table
    DataFrame.spark.to_spark_io
-   DataFrame.spark.explain
    DataFrame.spark.apply
    DataFrame.spark.repartition
    DataFrame.spark.coalesce
-   DataFrame.spark.checkpoint
-   DataFrame.spark.local_checkpoint
 
 .. _api.dataframe.plot:
 
@@ -321,6 +316,5 @@ These can be accessed by ``DataFrame.pandas_on_spark.<function/property>``.
 .. autosummary::
    :toctree: api/
 
-   DataFrame.pandas_on_spark.attach_id_column
    DataFrame.pandas_on_spark.apply_batch
    DataFrame.pandas_on_spark.transform_batch

python/docs/source/reference/pyspark.pandas/indexing.rst

@@ -111,7 +111,6 @@ in Spark. These can be accessed by ``Index.spark.<function/property>``.
 .. autosummary::
    :toctree: api/
 
-   Index.spark.data_type
    Index.spark.column
    Index.spark.transform
 

python/docs/source/reference/pyspark.pandas/series.rst

@@ -249,8 +249,6 @@ in Spark. These can be accessed by ``Series.spark.<function/property>``.
 .. autosummary::
    :toctree: api/
 
-   Series.spark.data_type
-   Series.spark.nullable
    Series.spark.column
    Series.spark.transform
    Series.spark.apply