Remove old location of test_controller.js

Remove old location of test_controller.js

Dartium references to the old location have been updated to the new location,
now we can safely remove the file.

Committed: https://code.google.com/p/dart/source/detail?r=18194

[Siggi Cherem (dart-lang), 2013-02-06 22:29:47]

Here is the CL that fixed dartium runner scripts:
https://codereview.chromium.org/12224040

And the cl that fixed individual layout tests in the dartium repo:
https://codereview.chromium.org/12244003/

[gram, 2013-02-06 22:34:44]

lgtm