Remove init.dart
Remove init.dart

We haven't used init.dart in several releases. We can safely remove this no-op
script now.

tvolkert/flutter,flutter/flutter,Hixie/flutter,jason-simmons/flutter,tvolkert/flutter,flutter/flutter,Hixie/flutter,turnidge/flutter,tvolkert/flutter,turnidge/flutter,cbracken/flutter,aghassemi/flutter,turnidge/flutter,cbracken/flutter,aghassemi/flutter,tvolkert/flutter,Hixie/flutter,flutter/flutter,flutter/flutter,flutter/flutter,cbracken/flutter,tvolkert/flutter,turnidge/flutter,flutter/flutter,cbracken/flutter,flutter/flutter,tvolkert/flutter,Hixie/flutter,cbracken/flutter,tvolkert/flutter,tvolkert/flutter,Hixie/flutter,flutter/flutter,jason-simmons/flutter,jason-simmons/flutter,aghassemi/flutter,cbracken/flutter,aghassemi/flutter,turnidge/flutter,Hixie/flutter,Hixie/flutter,jason-simmons/flutter,cbracken/flutter,cbracken/flutter,tvolkert/flutter,Hixie/flutter,flutter/flutter,tvolkert/flutter,Hixie/flutter,Hixie/flutter,cbracken/flutter,cbracken/flutter,flutter/flutter