I claimed nothing about what would happen in that situation. Just that it's not strictly true there is no enforcement arm of the judiciary
If nothing happens, there is no enforcement. Doesn't matter what 'arm' or 'leg' or swingin' Johnson' the court has. It natively has no authority to enforce jack squat.
EVEN if we twisted it to allow for them as the 'enforcement arm' it is the Marshall's acting through their vested authority from the EXECCUTIVE that is carrying out said action. Thus the power of enforcement is again, that of the exec, not of the judiciary.