Revert "Add support for V8 and Firefox stack traces in pkg/stack_trace."

This reverts commit r24502.

Review URL: https://codereview.chromium.org//17998002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart/pkg/stack_trace@24506 260f80e4-7a28-3924-810f-c04153c831b5
6 files changed
tree: 92d5d2931bb2add2f377e9c16c287c23ae084890
  1. pkgs/