Docs: [no-unnecessary-condition] list of checked expressions is stale

[kirkwaiblinger]

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• I have looked for existing open or closed documentation requests that match my proposal.
• I have read the FAQ and my problem is not listed.

Suggested Changes

typescript-eslint/packages/eslint-plugin/docs/rules/no-unnecessary-condition.mdx

Lines 15 to 20 in 7469e72

	The following expressions are checked:
	- Arguments to the `&&`, `||` and `?:` (ternary) operators
	- Conditions for `if`, `for`, `while`, and `do-while` statements
	- `case`s in `switch` statements
	- Base values of optional chain expressions

We also check things like array predicate return types and type predicates now

Affected URL(s)

https://typescript-eslint.io/rules/no-unnecessary-condition

Additional Info

We should either remove this list or update it to be accurate

[JoshuaKGoldberg]

Yeah, I think we can probably get rid of the list. Now that the rule handles a lot more cases it'd be a lot of energy+time to keep it up-to-date. Plus reading it is kind of a slog. I think the examples are good enough on their own.