You did not specify the context at all: which hardware? Assuming Linux, which distribution?
But in general, cim* processes would be components handling the WBEM monitoring/management protocol.
So, the impact will depend on whether your system is currently using WBEM for anything or not.
(If WBEM is not used, then you've successfully reduced the complexity of your system by switching off unnecessary components; but if WBEM is used, then your monitoring system should soon be alerting that it cannot get some hardware monitoring data it expects...)