remove gulp submodules

package.json

@@ -92,16 +92,6 @@
     "closure-compiler-jar": "git://github.com/eordano/closure-compiler-jar.git",
     "gulp": "^3.8.10",
     "gulp-bitcore": "^0.2.2",
-    "gulp-bump": "^0.1.11",
-    "gulp-closure-compiler": "^0.2.9",
-    "gulp-coveralls": "^0.1.3",
-    "gulp-git": "^0.5.5",
-    "gulp-jshint": "^1.9.0",
-    "gulp-mocha": "^2.0.0",
-    "gulp-rename": "^1.2.0",
-    "gulp-shell": "^0.2.10",
-    "gulp-uglify": "^1.0.2",
-    "gulp-util": "=3.0.1",
     "istanbul": "^0.3.5",
     "jsdoc": "^3.3.0-alpha11",
     "jsdoc-to-markdown": "=0.5.9",