JIT

Remove old shim code #695

Job	Run time
Interpreter (Debug)	9m 59s
aarch64-pc-windows-msvc/msvc (Debug)	4m 38s
i686-pc-windows-msvc/msvc (Debug)	5m 6s
x86_64-pc-windows-msvc/msvc (Debug)	1m 39s
aarch64-unknown-linux-gnu/gcc (Debug)	2m 5s
aarch64-pc-windows-msvc/msvc (Release)	3m 41s
aarch64-apple-darwin/clang (Release)	2m 43s
x86_64-unknown-linux-gnu/gcc (Release)	2m 4s
x86_64-unknown-linux-gnu/gcc (Debug)	1m 36s
x86_64-apple-darwin/clang (Debug)	5m 26s
x86_64-apple-darwin/clang (Release)	6m 19s
x86_64-pc-windows-msvc/msvc (Release)	1m 34s
aarch64-unknown-linux-gnu/gcc (Release)	2m 32s
i686-pc-windows-msvc/msvc (Release)	1m 53s
aarch64-apple-darwin/clang (Debug)	2m 17s
	53m 32s

Provide feedback