All import instruction are cleaned without distinction

[tuxcy17]

The merge option work pretty well, except when we use third parties.

For example in my interface I use Observable as an external type provided by rxjs

import { BehaviorSubject, Observable } from "rxjs";

export interface DataService<T> {
  foo: BehaviorSubject<T>,
  bar(): Observable<T>
}

The merged result is clean but unesable

// no import :/
export interface DataService<T> {
  foo: BehaviorSubject<T>,
  bar(): Observable<T>
}

It will be interesting to provide a property in the config object to protect some import