Remove path-is-absolute dependency

Author: sibiraj-s

lib/grunt/file.js

@@ -16,7 +16,6 @@ file.findup = require('findup-sync');
 var YAML = require('js-yaml');
 var rimraf = require('rimraf');
 var iconv = require('iconv-lite');
-var pathIsAbsolute = require('path-is-absolute');
 var mkdirp = require('mkdirp').sync;
 
 // Windows?
@@ -407,7 +406,7 @@ file.isFile = function() {
 // Is a given file path absolute?
 file.isPathAbsolute = function() {
   var filepath = path.join.apply(path, arguments);
-  return pathIsAbsolute(filepath);
+  return path.isAbsolute(filepath);
 };
 
 // Do all the specified paths refer to the same path?

package.json

@@ -51,7 +51,6 @@
     "minimatch": "~3.0.4",
     "mkdirp": "~1.0.4",
     "nopt": "~3.0.6",
-    "path-is-absolute": "~2.0.0",
     "rimraf": "~3.0.2"
   },
   "devDependencies": {