hterm: stop listing test code in deps
hterm: stop listing test code in deps

We never use the test code in releases, so stop pulling it in.
We explicitly list it in the test.html files already.

Change-Id: I0e419b11a3041ac33f3556c31d1d3a4ce2d5f153
Reviewed-on: https://chromium-review.googlesource.com/c/1379126
Reviewed-by: Vitaliy Shipitsyn <6f51537d61e46a00bf958b60dbef5b5870c2bf22@google.com>
Tested-by: Mike Frysinger <8f3f75c74bd5184edcfa6534cab3c13a00a2f794@chromium.org>

chromium/hterm,chromium/hterm,chromium/hterm,chromium/hterm