chore: use @babel/eslint-config-internal (#11026)

packages/babel-parser/src/plugins/estree.js

@@ -1,7 +1,5 @@
 // @flow
 
-/* global BigInt */
-
 import { types as tt, TokenType } from "../tokenizer/types";
 import type Parser from "../parser";
 import type { ExpressionErrors } from "../parser/util";

packages/babel-parser/test/helpers/runFixtureTests.js

@@ -1,5 +1,3 @@
-/* global BigInt */
-
 import { multiple as getFixtures } from "@babel/helper-fixtures";
 import { codeFrameColumns } from "@babel/code-frame";
 import fs from "fs";