fix(lib): rm comment, rename const => var (#452)

Author: michael-ciniawsky

lib/convert-source-map.js

@@ -7,8 +7,6 @@ var path = require('path');
 
 var commentRx = /^\s*\/(?:\/|\*)[@#]\s+sourceMappingURL=data:(?:application|text)\/json;(?:charset[:=]\S+?;)?base64,(?:.*)$/mg;
 var mapFileCommentRx =
-  //Example (Extra space between slashes added to solve Safari bug. Exclude space in production):
-  //     / /# sourceMappingURL=foo.js.map           /*# sourceMappingURL=foo.js.map */
   /(?:\/\/[@#][ \t]+sourceMappingURL=([^\s'"]+?)[ \t]*$)|(?:\/\*[@#][ \t]+sourceMappingURL=([^\*]+?)[ \t]*(?:\*\/){1}[ \t]*$)/mg
 
 function decodeBase64(base64) {

lib/css-base.js

@@ -9,7 +9,7 @@ module.exports = function() {
 	// return the list of modules as css string
 	list.toString = function toString() {
 		return this.map(function (item) {
-			const content = cssWithMappingToString(item);
+			var content = cssWithMappingToString(item);
 			if(item[2]) {
 				return "@media " + item[2] + "{" + content + "}";
 			} else {

package.json

@@ -13,7 +13,6 @@
   ],
   "dependencies": {
     "babel-code-frame": "^6.11.0",
-    "convert-source-map": "^1.3.0",
     "css-selector-tokenizer": "^0.7.0",
     "cssnano": ">=2.6.1 <4",
     "loader-utils": "^1.0.2",