fix(message): revert 'Add Flag Support' (#264)

[shellcromancer]

Description

This reverts commit 1acc9a0 and follow-up changes. We've observed this not correctly skipping missing values before with sparsely populated datasets. This results in many null values

Motivation and Context

We observed a data quality regression from the v2.2+ releases stemming from value skipping. This reverts those changes to address that.

How Has This Been Tested?

This playground link does not work with the changes but now correctly transforms when a missing value is inspected.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.