Remove the dependency on "path".

We never imported this, so it's not clear why the dependency was even
added.

Closes dart-lang/string_scanner#2

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//1589013004 .
2 files changed
tree: 11077108c51336c1acecb0bb3e90a7cd0b5a0d3b
  1. pkgs/