All above seem to cover the question.
However some situations do require interpretation and judgements, best left to the manufacturer and company procedures.
It sounds to me like this is outside the purvey of a ground deicing company (you better have the procedures available to display
It's impractical for a ground deicing company to perform an operating function or maintenance function on an aircraft which is what would be required to get rid of ice inside an engine pod.
The safety of flight must always be paramount, and this is often assured by ground operating procedures before starting the takeoff roll (runups at prescribe conditions to shed the ice when its small enough not to cause damage to the engine parts.
Aerodynamic issues are not significant (for the engines) since by the time you have got the engines anywhere near its stall line, the ground-idle ice has shed (its the possibilty of mechanical dmg from the ice shed that is to be avoided)
Lots of room for more discussion on this e.g. what do you do when there is way too much ice buildup to safely shed