Remove unneeded DEPS file in chrome/browser/android/webapps.

BUG=None

Change-Id: I2608465fce0ca012d906f8190da541770c5b44ef
Reviewed-on: https://chromium-review.googlesource.com/809915Reviewed-by: David Trainor <dtrainor@chromium.org>
Commit-Queue: Dominick Ng <dominickn@chromium.org>
Cr-Commit-Position: refs/heads/master@{#522260}

chrome/browser/android/webapps/DEPS

-specific_include_rules = {
-  "add_to_homescreen_data_fetcher_unittest\.cc": [
-    "+content/browser/service_worker/embedded_worker_test_helper.h",
-    "+content/browser/service_worker/service_worker_context_core.h",
-    "+content/common/service_worker/service_worker_status_code.h",
-    "+content/test",
-  ],
-}
-