chore(git): cleanup .gitignore

all obsolete paths have been removed

.gitignore

@@ -1,26 +1,9 @@
 .DS_STORE
 
-# Don’t commit the following directories created by pub.
-packages
-pubspec.lock
-.pub
-.packages
-
 /dist/
-.buildlog
 node_modules
 bower_components
 
-# Or broccoli working directory
-tmp
-
-# Or the files created by dart2js.
-*.dart.js
-*.dart.precompiled.js
-*.js_
-*.js.deps
-*.js.map
-
 # Include when developing application packages.
 pubspec.lock
 .c9
@@ -37,13 +20,8 @@ modules/.vscode
 # Ignore npm debug log
 npm-debug.log
 
-/docs/bower_components/
-
 # build-analytics
 .build-analytics
 
-# built dart payload tests
-/modules_dart/payload/**/build
-
 # rollup-test output
 /modules/rollup-test/dist/