Enhancement: Remove 2 year old backwards compatibility check from getParserServices

[JoshuaKGoldberg]

Before You File a Proposal Please Confirm You Have Done The Following...

• I have searched for related issues and found none that match my proposal.
• I have searched the current rule list and found no rules that match my proposal.
• I have read the FAQ and my problem is not listed.

Relevant Package

utils

My proposal is suitable for this project

• I believe my proposal would be useful to the broader TypeScript community (meaning it is not a niche proposal).

Description

The getParserServices function contains this comment:

// backwards compatibility check
// old versions of the parser would not return any parserServices unless parserOptions.project was set

Additionally, later on in that file:

const hasFullTypeInformation =
  context.parserServices.hasFullTypeInformation ??
  /* backwards compatible */ true;

Does that mean we can get rid of some of the code in that file?

Fail

n/a

Pass

n/a

Additional Info

No response

[JoshuaKGoldberg]

Not time sensitive at all, but assigning @bradzacher per the Git blame for triage.

[bradzacher]

This has been merged into the v6 branch