cleanup ignore files

.gitignore

@@ -1,30 +1,6 @@
-# See https://www.dartlang.org/tools/private-files.html
+# See https://www.dartlang.org/guides/libraries/private-files
 
 # Files and directories created by pub
-.buildlog
 .packages
-.project
 .pub
-**/build
-**/packages
-
-# Files created by dart2js
-# (Most Dart developers will use pub build to compile Dart, use/modify these
-#  rules if you intend to use dart2js directly
-#  Convention is to use extension '.dart.js' for Dart compiled to Javascript to
-#  differentiate from explicit Javascript files)
-*.dart.js
-*.part.js
-*.js.deps
-*.js.map
-*.info.json
-
-# Directory created by dartdoc
-doc/api/
-
-# Don't commit pubspec lock file
-# (Library packages only! Remove pattern if developing an application package)
 pubspec.lock
-
-*.iml
-.idea