remove unnecessary and error inducing method from Map flow type

Reviewed By: mroch

Differential Revision: D6198877

fbshipit-source-id: 77a058072f439339a92fa07702a0429c4ca3282f

Author: usikder

flow/Map.js

@@ -19,7 +19,6 @@ declare module "Map" {
     @@iterator(): Iterator<[K, V]>;
     constructor<Key, Value>(_: void): MapPolyfill<Key, Value>;
     constructor<Key, Value>(_: null): MapPolyfill<Key, Value>;
-    constructor<Key, Value>(iterable: Array<[Key, Value]>): MapPolyfill<Key, Value>;
     constructor<Key, Value>(iterable: Iterable<[Key, Value]>): MapPolyfill<Key, Value>;
     clear(): void;
     delete(key: K): boolean;