Fix map literals from change 17410

Remove any type arguments from map literals
that had one type argument before change 17410.
Review URL: https://codereview.chromium.org//12045024

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@17412 260f80e4-7a28-3924-810f-c04153c831b5
1 file changed
tree: 6d3d546519ccea1b0ebf0ce898348ee4da4408d4
  1. lib/
  2. test/
  3. pubspec.yaml