Remove remaining @flow annotations

packages/babylon/src/parser/comments.js

@@ -1,4 +1,3 @@
-/* @flow */
 /* eslint max-len: 0 */
 
 /**

packages/babylon/src/parser/index.js

@@ -1,5 +1,3 @@
-/* @flow */
-
 import { reservedWords } from "../util/identifier";
 import { getOptions } from "../options";
 import Tokenizer from "../tokenizer";

packages/babylon/src/parser/util.js

@@ -1,5 +1,3 @@
-/* @flow */
-
 import { types as tt } from "../tokenizer/types";
 import Parser from "./index";
 import { lineBreak } from "../util/whitespace";