remove coffeescript from build process

package.json

@@ -28,7 +28,6 @@
     "express": "^4.12.0",
     "gulp": "^3.8.11",
     "gulp-clean": "^0.3.1",
-    "gulp-coffee": "^2.3.1",
     "gulp-concat": "^2.5.2",
     "gulp-connect": "^2.2.0",
     "gulp-declare": "^0.3.0",
@@ -38,7 +37,6 @@
     "gulp-order": "^1.1.1",
     "gulp-rename": "^1.2.0",
     "gulp-uglify": "^1.1.0",
-    "gulp-util": "^3.0.4",
     "gulp-watch": "^4.1.1",
     "gulp-wrap": "^0.11.0",
     "http-server": "git+https://github.com/nodeapps/http-server.git",