Delete unused variables in jit. Part1. (#23399)

Delete unused variables in jit. Part1. (#23399)

* Clean `assertionprop.cpp`.

* Clean `codegencommon.cpp`.:

* Clean `codegenlinear.cpp`.

* Clean `compiler.cpp`.

* Clean `earlyprop.cpp`.

* Clean `gschecks.cpp`.

* Clean 'lclvars.cpp`.

* Clean `jiteh.cpp`.

* Clean `liveness.cpp`.

* Clean `hashbv.cpp`.

* Clean `gcinfo.cpp`.

* Clean `optimizer.cpp`.