From VG247: “It is very clear the vocal members of the Call of Duty community did not appreciate Modern Warfares lack of minimap.
One of the biggest gameplay changes Infinity Ward revealed for Call of Duty: Modern Warfare has been dropping the minimap for a PUBG-style compass that sits at the top of the screen.”
Source: N4G PC Call of Duty: Modern Warfare's most controversial change lasted all of two days in the beta