JIT

remove unused _PyFunction_LookupByVersion #5278

Job	Run time
Interpreter (Debug)	11m 20s
JIT with tail calling interpreter (21)	4m 32s
Free-Threaded (Debug) (21)	18m 9s
JIT without optimizations (Debug) (21)	13m 34s
x86_64-pc-windows-msvc/msvc (Debug)	26m 48s
x86_64-pc-windows-msvc/msvc (Release)	16m 9s
x86_64-apple-darwin/clang (Debug)	30m 14s
aarch64-apple-darwin/clang (Debug)	18m 41s
x86_64-apple-darwin/clang (Release)	23m 32s
i686-pc-windows-msvc/msvc (Release)	17m 8s
aarch64-pc-windows-msvc/msvc (Release)	17m 53s
i686-pc-windows-msvc/msvc (Debug)	28m 7s
x86_64-unknown-linux-gnu/gcc (Debug)	13m 10s
aarch64-apple-darwin/clang (Release)	10m 33s
aarch64-unknown-linux-gnu/gcc (Release)	7m 2s
x86_64-unknown-linux-gnu/gcc (Release)	8m 31s
aarch64-pc-windows-msvc/msvc (Debug)	23m 46s
aarch64-unknown-linux-gnu/gcc (Debug)	8m 32s
	4h 57m 41s

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