ServiceWorker: Remove unused expectations for LayoutTests

These are accidentally added by r175288.


BUG=n/a
TEST=n/a

Review URL: https://codereview.chromium.org/320423006

git-svn-id: svn://svn.chromium.org/blink/trunk@175878 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/LayoutTests/http/tests/serviceworker/current-on-load-expected.txt

-This is a testharness.js-based test.
-FAIL current is set for a controlled document assert_unreached: Unregister should not fail: NotSupportedError Reached unreachable code
-Harness: the test ran to completion.
-

third_party/WebKit/LayoutTests/http/tests/serviceworker/current-on-reload-expected.txt

-This is a testharness.js-based test.
-FAIL current is set upon reload after registration assert_unreached: Unregister should not fail: NotSupportedError Reached unreachable code
-Harness: the test ran to completion.
-