EG does have some links to EM, primarily, RapidMiner tool.
It should be a need basis anyways, is anyone dong data mining, predictive analytics requiring neural networks or text analytics? Fraud analysis or decision trees or market basket analysis are a few tools available only in EM.
EG links to EM in another way for EM projects that I can't recall, so the question is also are you okay abandoning all projects built in EM. If you have the score code this may not be an issue, but you may need to verify if any projects need migration.