From dfd02175b560ed540b09b40528cffab814e460cd Mon Sep 17 00:00:00 2001
From: Evan Morikawa <evan@evanmorikawa.com>
Date: Tue, 3 May 2016 18:06:03 -0700
Subject: [PATCH] feat(babel6): Remove support for @babel header

---
 src/compile-cache.js         |  1 -
 src/compile-support/babel.js | 18 +-----------------
 2 files changed, 1 insertion(+), 18 deletions(-)

diff --git a/src/compile-cache.js b/src/compile-cache.js
index 186d98b40..71c790386 100644
--- a/src/compile-cache.js
+++ b/src/compile-cache.js
@@ -9,7 +9,6 @@ var typescriptCompiler = require('./compile-support/typescript')
 var CSON = null
 
 var COMPILERS = {
-  '.js': babelCompiler,
   '.jsx': babelCompiler,
   '.es6': babelCompiler,
   '.ts': typescriptCompiler,
diff --git a/src/compile-support/babel.js b/src/compile-support/babel.js
index df03b5e11..406818dad 100644
--- a/src/compile-support/babel.js
+++ b/src/compile-support/babel.js
@@ -7,24 +7,8 @@ var defaultOptions = require('../../static/babelrc.json')
 var babel = null
 var babelVersionDirectory = null
 
-var PREFIXES = [
-  '/** @babel */',
-  '"use babel"',
-  '\'use babel\''
-]
-
-var PREFIX_LENGTH = Math.max.apply(Math, PREFIXES.map(function (prefix) {
-  return prefix.length
-}))
-
 exports.shouldCompile = function (sourceCode, filePath) {
-  if (filePath.endsWith('.es6') || filePath.endsWith('.jsx')) {
-    return true;
-  }
-  var start = sourceCode.substr(0, PREFIX_LENGTH)
-  return PREFIXES.some(function (prefix) {
-    return start.indexOf(prefix) === 0
-  });
+  return (filePath.endsWith('.es6') || filePath.endsWith('.jsx'))
 }
 
 exports.getCachePath = function (sourceCode) {