cleaning up gitignore

.gitignore

@@ -7,18 +7,6 @@ pids
 *.pid
 *.seed
 
-# Directory for instrumented libs generated by jscoverage/JSCover
-lib-cov
-
-# Coverage directory used by tools like istanbul
-coverage
-
-# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
-.grunt
-
-# Compiled binary addons (http://nodejs.org/api/addons.html)
-build/Release
-
 # Dependency directory
 # Deployed apps should consider commenting this line out:
 # see https://npmjs.org/doc/faq.html#Should-I-check-my-node_modules-folder-into-git