Remove handling of babelrc (#3344)

babelrc is the config file of babel and not babylon

packages/jest-editor-support/src/parsers/BabylonParser.js

@@ -14,51 +14,13 @@ const {readFileSync} = require('fs');
 const babylon = require('babylon');
 const {Expect, ItBlock} = require('./ParserNodes');
 
-const path = require('path');
-const fs = require('fs');
-
-const BABELRC_FILENAME = '.babelrc';
-const cache = Object.create(null);
-
-// This is a copy of babel-jest's parser, but it takes create-react-app
-// into account, and will return an empty JSON object instead of "".
-const getBabelRC = (filename, {useCache}) => {
- // Special case for create-react-app, which hides the .babelrc
- const paths: string[] = ['node_modules/react-scripts/'];
- let directory = filename;
- while (directory !== (directory = path.dirname(directory))) {
- if (useCache && cache[directory]) {
- break;
- }
-
- paths.push(directory);
- const configFilePath = path.join(directory, BABELRC_FILENAME);
- if (fs.existsSync(configFilePath)) {
- cache[directory] = fs.readFileSync(configFilePath, 'utf8');
- break;
- }
- }
- paths.forEach(directoryPath => {
- cache[directoryPath] = cache[directory];
- });
-
- // return an empy JSON parse compatible string
- return cache[directory] || '{}';
-};
-
 const parse = (file: string) => {
  const itBlocks: ItBlock[] = [];
  const expects: Expect[] = [];
 
  const data = readFileSync(file).toString();
- const babelRC = getBabelRC(file, {useCache: true});
- const babel = JSON.parse(babelRC);
-
- const plugins = Array.isArray(babel.plugins)
- ? babel.plugins.concat(['*'])
- : ['*'];
 
- const config = {plugins, sourceType: 'module'};
+ const config = {plugins: ['*'], sourceType: 'module'};
  const ast = babylon.parse(data, config);
 
  // An `it`/`test` was found in the AST