[workerpool] Remove WorkerPool.clear and WorkerPoolOptions.nodeWorker.

[tamuratak]

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WorkerPool.clear and WorkerPoolOptions.nodeWorker have been removed.

[typescript-bot]

@tamuratak Thank you for submitting this PR!

This is a live comment which I will keep updated.

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Because you edited one package and updated the tests (👏), I can help you merge this PR once someone else signs off on it.

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Once every item on this list is checked, I'll ask you for permission to merge and publish the changes.

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Diagnostic Information: What the bot saw about this PR

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[typescript-bot]

🔔 @Alorel @sgkim126 - please review this PR in the next few days. Be sure to explicitly select Approve or Request Changes in the GitHub UI so I know what's going on.

[typescript-bot]

👋 Hi there! I’ve run some quick measurements against master and your PR. These metrics should help the humans reviewing this PR gauge whether it might negatively affect compile times or editor responsiveness for users who install these typings.

Let’s review the numbers, shall we?

Comparison details 📊

	master	#45753	diff
Batch compilation
Memory usage (MiB)	61.7	62.8	+1.8%
Type count	9327	9318	0%
Assignability cache size	1783	1783	0%
Language service
Samples taken	176	167	-5%
Identifiers in tests	176	167	-5%
getCompletionsAtPosition
Mean duration (ms)	327.6	326.8	-0.2%
Mean CV	11.2%	11.2%
Worst duration (ms)	464.3	482.9	+4.0%
Worst identifier	pool	terminate
getQuickInfoAtPosition
Mean duration (ms)	323.3	322.8	-0.2%
Mean CV	10.2%	10.7%	+4.3%
Worst duration (ms)	438.9	495.1	+12.8%
Worst identifier	pool	then

It looks like nothing changed too much. I won’t post performance data again unless it gets worse.