refactor: remove unneeded PyList type checks, Graph.Adjacency() now a… #1487

Job	Run time
Build wheels on macOS (x86_64)	1m 24s
Build wheels on macOS (x86_64)	17m 26s
Build wheels on Linux (x86_64)	15m 58s
Build wheels on Linux (x86_64)	15m 58s
Build wheels on macOS (arm64)	6m 17s
Build wheels on macOS (arm64)	6m 17s
Build wheels on Linux (i686)	14m 2s
Build wheels on Linux (i686)	14m 2s
Build wheels on Linux (aarch64/manylinux)	0s
Build wheels on Linux (aarch64/manylinux)	0s
Build sdist and test extra dependencies	2m 44s
Build sdist and test extra dependencies	2m 44s
Build wheels on Linux (aarch64/musllinux)	0s
Build wheels on Linux (aarch64/musllinux)	0s
Build wheels for WebAssembly	4m 49s
Build wheels for WebAssembly	4m 49s
Build wheels on Windows (Win32)	14m 18s
Build wheels on Windows (Win32)	14m 18s
Build with sanitizers for debugging purposes	39s
Build with sanitizers for debugging purposes	39s
Build wheels on Windows (x64)	25m 9s
Build wheels on Windows (x64)	25m 9s
	3h 6m 42s

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