All the stubs in interpreter/zero/bytecodeInterpreterProfiling.hpp are empty. History shows the whole thing gradually moved to template interpreter. We can probably simplify Zero code by dropping these empty stubs altogether. Arguably, this makes porting to new architectures a bit harder, but it seems that the proper stepping stone after Zero is implementing template interpreter anyway.

On my TR 3970X, this improves:
 - Linux x86_64 Zero "make images" times from ~18 minutes to ~17.5 minutes