Enable unneeded_throws_rethrows rule

[SimplyDanny]

No description provided.

[SwiftLintBot]

	1 Warning
⚠️	If this is a user-facing change, please include a CHANGELOG entry to credit yourself! You can find it at CHANGELOG.md.

	18 Messages
📖	Building this branch resulted in the same binary size as when built on main.
📖	Linting Aerial with this PR took 0.76 s vs 0.72 s on main (5% slower).
📖	Linting Alamofire with this PR took 1.02 s vs 1.04 s on main (1% faster).
📖	Linting Brave with this PR took 6.71 s vs 6.71 s on main (0% slower).
📖	Linting DuckDuckGo with this PR took 20.73 s vs 20.86 s on main (0% faster).
📖	Linting Firefox with this PR took 10.64 s vs 10.62 s on main (0% slower).
📖	Linting Kickstarter with this PR took 7.46 s vs 7.42 s on main (0% slower).
📖	Linting Moya with this PR took 0.41 s vs 0.4 s on main (2% slower).
📖	Linting NetNewsWire with this PR took 2.35 s vs 2.37 s on main (0% faster).
📖	Linting Nimble with this PR took 0.64 s vs 0.59 s on main (8% slower).
📖	Linting PocketCasts with this PR took 6.83 s vs 6.78 s on main (0% slower).
📖	Linting Quick with this PR took 0.4 s vs 0.37 s on main (8% slower).
📖	Linting Realm with this PR took 3.19 s vs 3.21 s on main (0% faster).
📖	Linting Sourcery with this PR took 1.75 s vs 1.78 s on main (1% faster).
📖	Linting Swift with this PR took 4.11 s vs 4.11 s on main (0% slower).
📖	Linting VLC with this PR took 1.07 s vs 1.05 s on main (1% slower).
📖	Linting Wire with this PR took 17.04 s vs 17.01 s on main (0% slower).
📖	Linting WordPress with this PR took 11.18 s vs 11.16 s on main (0% slower).

Here's an example of your CHANGELOG entry:

* Enable `unneeded_throws_rethrows` rule.  
  [SimplyDanny](https://github.com/SimplyDanny)
  [#issue_number](https://github.com/realm/SwiftLint/issues/issue_number)

note: There are two invisible spaces after the entry's text.

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