feat(api): update admin deletion policy (#1935)

api/errors.go

@@ -15,7 +15,6 @@ const (
 	ErrUserAlreadyExists       = Error("User already exists")
 	ErrInvalidUsername         = Error("Invalid username. White spaces are not allowed")
 	ErrAdminAlreadyInitialized = Error("An administrator user already exists")
-	ErrCannotRemoveAdmin       = Error("Cannot remove the default administrator account")
 	ErrAdminCannotRemoveSelf   = Error("Cannot remove your own user account. Contact another administrator")
 )
 

api/http/handler/user.go

@@ -397,11 +397,6 @@ func (handler *UserHandler) handleDeleteUser(w http.ResponseWriter, r *http.Requ
 		return
 	}
 
-	if userID == 1 {
-		httperror.WriteErrorResponse(w, portainer.ErrCannotRemoveAdmin, http.StatusForbidden, handler.Logger)
-		return
-	}
-
 	tokenData, err := security.RetrieveTokenData(r)
 	if err != nil {
 		httperror.WriteErrorResponse(w, err, http.StatusInternalServerError, handler.Logger)