[SEDONA-169] Fix ST_RemovePoint in accordance with the API document

[sekikn]

Did you read the Contributor Guide?

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

Is this PR related to a JIRA ticket?

• Yes, the URL of the assoicated JIRA ticket is https://issues.apache.org/jira/browse/SEDONA-169. The PR name follows the format [SEDONA-XXX] my subject.

What changes were proposed in this PR?

This PR fixes ST_RemovePoint to work without the second parameter, in accordance with its API document.

How was this patch tested?

Ran mvn clean install locally.

Did this PR include necessary documentation updates?

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

[jiayuasu]

Do you think we should move this logic to the Sedona common module?

[sekikn]

Thank you for the review, as usual! I'll submit another PR later that adds the ST_AddPoint and ST_RemovePoint functions to Flink, so I'll move this logic into common in that PR.