module: revert "optimize js and json file i/o"

This reverts commit 7c60328. It is causing CI failures on Windows. Ref: #4575 PR-URL: #4679 Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>

Author: Trott

lib/module.js

@@ -428,14 +428,14 @@ Module.prototype._compile = function(content, filename) {
 
 // Native extension for .js
 Module._extensions['.js'] = function(module, filename) {
- var content = internalModuleReadFile(filename);
+ var content = fs.readFileSync(filename, 'utf8');
  module._compile(internalModule.stripBOM(content), filename);
 };
 
 
 // Native extension for .json
 Module._extensions['.json'] = function(module, filename) {
- var content = internalModuleReadFile(filename);
+ var content = fs.readFileSync(filename, 'utf8');
  try {
  module.exports = JSON.parse(internalModule.stripBOM(content));
  } catch (err) {