Currently, i am using adsense Mediation features on ezoic, I want to know, that should i remove the adsense header script code (code between the <head></head>), which i have placed it during setup of adsense account?...or i keep it?
You'll want to keep that set up, as it allows Adsense to work on the site. Mediation is basically both parties working on the site at once, so the code is still required for Adsense to operate.