Do they even need to target OSHA specifically now that they eliminated Chevron deference? Presumably, as with all other federal agencies, all OSHA regulations

Do they even need to target OSHA specifically now that they eliminated Chevron deference? Presumably, as with all other federal agencies, all OSHA regulations not specifically encoded into the law by congress are moot, and can only be re-established via lengthy and expensive litigation, where judges (instead of domain experts) will set the technical standards.