Revert "Fix JIT initialization race"

This reverts commit ba4865edffc696b4fe5d2c5b5d580b128f6bec5e.
Revert "Fix JIT bug related to immediate doubles"

This reverts commit f4ca93b9b493fb43543e689e406481c340432e8d.
Revert "JIT: Performance fix for const doubles": 3 previous changes to the jit was causing lock ups and reboots

This reverts commit a4408acdca9da007c665e95cab181a5f577feaa4.