Remove 'electron-gh-releases' from depedencies

Author: Emmanouil Konstantinidis

package.json

@@ -78,7 +78,6 @@
     "babelify": "=6.1.3",
     "bootstrap": "=3.3.5",
     "browserify": "=11.0.1",
-    "electron-gh-releases": "=1.0.1",
     "font-awesome": "=4.4.0",
     "octicons": "=2.4.1",
     "react": "=0.13.3",