types: remove old signature (nodejs#1658)

Author: KhafraDev

index.d.ts

@@ -25,8 +25,6 @@ export { Interceptable } from './types/mock-interceptor'
 export { Dispatcher, BalancedPool, Pool, Client, buildConnector, errors, Agent, request, stream, pipeline, connect, upgrade, setGlobalDispatcher, getGlobalDispatcher, setGlobalOrigin, getGlobalOrigin, MockClient, MockPool, MockAgent, mockErrors, ProxyAgent, RedirectHandler, DecoratorHandler }
 export default Undici
 
-declare function Undici(url: string, opts: Pool.Options): Pool
-
 declare namespace Undici {
   var Dispatcher: typeof import('./types/dispatcher')
   var Pool: typeof import('./types/pool');

test/types/index.test-d.ts

@@ -2,7 +2,6 @@ import { expectAssignable } from 'tsd'
 import Undici, {Pool, Client, errors, fetch, Interceptable, RedirectHandler, DecoratorHandler} from '../..'
 import Dispatcher from "../../types/dispatcher";
 
-expectAssignable<Pool>(Undici('', {}))
 expectAssignable<Pool>(new Undici.Pool('', {}))
 expectAssignable<Client>(new Undici.Client('', {}))
 expectAssignable<Interceptable>(new Undici.MockAgent().get(''))