remove grunt jshint artifacts not needed

resolves some of the npm audit warnings
diff --git a/Gruntfile.js b/Gruntfile.js
index e2f8df2..ebf9a19 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -49,17 +49,10 @@
             "browser": {}
         },
         clean: ['pkg'],
-        jshint: {
-            options: {
-                jshintrc: '.jshintrc',
-            },
-            src: ['src/**/*.js']
-        },
     });
 
     // external tasks
     grunt.loadNpmTasks('grunt-contrib-clean');
-    grunt.loadNpmTasks('grunt-contrib-jshint');
 
     // custom tasks
     grunt.loadTasks('tasks');
diff --git a/package.json b/package.json
index c08188a..b7c192c 100644
--- a/package.json
+++ b/package.json
@@ -78,7 +78,6 @@
     "eslint-plugin-standard": "^3.0.1",
     "grunt": "^1.0.1",
     "grunt-contrib-clean": "^1.0.0",
-    "grunt-contrib-jshint": "^1.0.0",
     "istanbul": "^0.4.5",
     "jasmine-node": "1.14.5",
     "jsdom-no-contextify": "^3.1.0",