Changing to file level use strict statement

lib/adapters/http.js

@@ -1,3 +1,5 @@
+'use strict';
+
 var defaults = require('./../defaults');
 var utils = require('./../utils');
 var buildUrl = require('./../helpers/buildUrl');
@@ -9,8 +11,6 @@ var pkg = require('./../../package.json');
 var Buffer = require('buffer').Buffer;
 
 module.exports = function httpAdapter(resolve, reject, config) {
-  'use strict';
-
   // Transform request data
   var data = transformData(
     config.data,

lib/adapters/xhr.js

@@ -1,3 +1,5 @@
+'use strict';
+
 /*global ActiveXObject:true*/
 
 var defaults = require('./../defaults');
@@ -9,8 +11,6 @@ var transformData = require('./../helpers/transformData');
 var urlIsSameOrigin = require('./../helpers/urlIsSameOrigin');
 
 module.exports = function xhrAdapter(resolve, reject, config) {
-  'use strict';
-
   // Transform request data
   var data = transformData(
     config.data,