[ADAP-1074] [Implementation] Remove invalid_insert_overwrite_delta_msg message

[dbeatty10]

Is this your first time submitting a feature request?

• I have read the expectations for open source contributors
• I have searched the existing issues, and I could not find an existing issue for this feature
• I am requesting a straightforward extension of existing dbt-spark functionality, rather than a Big Idea better suited to a discussion

Describe the feature

While researching dbt-labs/docs.getdbt.com#4639, it looks like this code is unused since #700.

So I'd propose we remove it altogether.

Searching both dbt-spark and dbt-databricks didn't yield any other references to invalid_insert_overwrite_delta_msg:

• https://github.com/search?q=repo%3Adbt-labs%2Fdbt-spark%20invalid_insert_overwrite_delta_msg&type=code
• https://github.com/search?q=repo%3Adatabricks%2Fdbt-databricks%20invalid_insert_overwrite_delta_msg&type=code

Describe alternatives you've considered

One alternative is to leave it as-is.

It's not hurting anything functionality-wise, but it I was initially confused when reading through the code while researching the behavior of incremental strategies of dbt-spark and dbt-databricks.

Who will this benefit?

Removing unused pieces will make the code easier to read and maintain.

Are you interested in contributing this feature?

No response

Anything else?

No response