Why can't you remove the Apps Icon in Android N

[AC Question]

I have 3 docks all have the Apps icon/link. You can't remove it you can move it from the dock to the screen but you can't remove it. Help I don't need 3 icons to the apps

 

[the tall guy]

Hi, are you running a custom launcher from the Play Store? have you tried long pressing on the app and removing it that way?