Remove WeakComputedProperyRule

[jpsim]

Addresses #2712

[SwiftLintBot]

	12 Messages
📖	Linting Aerial with this PR took 3.19s vs 3.15s on master (1% slower)
📖	Linting Alamofire with this PR took 5.23s vs 5.29s on master (1% faster)
📖	Linting Firefox with this PR took 13.86s vs 13.88s on master (0% faster)
📖	Linting Kickstarter with this PR took 27.06s vs 27.4s on master (1% faster)
📖	Linting Moya with this PR took 2.87s vs 2.64s on master (8% slower)
📖	Linting Nimble with this PR took 2.25s vs 2.3s on master (2% faster)
📖	Linting Quick with this PR took 0.83s vs 0.81s on master (2% slower)
📖	Linting Realm with this PR took 3.92s vs 3.92s on master (0% slower)
📖	Linting SourceKitten with this PR took 1.53s vs 1.54s on master (0% faster)
📖	Linting Sourcery with this PR took 4.98s vs 5.04s on master (1% faster)
📖	Linting Swift with this PR took 38.52s vs 39.19s on master (1% faster)
📖	Linting WordPress with this PR took 30.6s vs 30.54s on master (0% slower)

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