gh-114281: Remove incorrect type hints from `asyncio.staggered` #99766

Job	Run time
Check for source changes	12s
Check if generated files are up to date	4m 28s
Address sanitizer	6m 32s
CIFuzz	0s
Ubuntu SSL tests with OpenSSL (1.1.1w)	1m 53s
Hypothesis tests on Ubuntu	4m 37s
Ubuntu SSL tests with OpenSSL (3.0.11)	1m 55s
Ubuntu SSL tests with OpenSSL (3.1.3)	1m 53s
Windows (free-threading) / build and test (x64)	15m 15s
Windows (free-threading) / build (arm64)	2m 9s
Windows (free-threading) / build and test (x86)	15m 38s
macOS / build and test	10m 50s
macOS (free-threading) / build and test	10m 24s
Ubuntu / build and test	6m 39s
Ubuntu (free-threading) / build and test	6m 41s
Windows / build and test (x86)	13m 23s
Windows / build and test (x64)	12m 48s
Windows / build (arm64)	2m 37s
Docs / Docs	2m 27s
Docs / Docs (Oldest Sphinx)	1m 34s
Docs / Doctest	5m 46s
All required checks pass	4s
	2h 7m 45s

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