Revert "Add browser tests for AppLaunchHandler."

This reverts commit dd223e70.

Reason for revert: these tests have been failing constently on MSAN builders
https://ci.chromium.org/p/chromium/builders/ci/Linux%20ChromiumOS%20MSan%20Tests

Original change's description:
> Add browser tests for AppLaunchHandler.
>
> Add browser tests for AppLaunchHandler to verify the restoration
> process.
>
> BUG=1146900
>
> Change-Id: Ibeaf262080a24c680718888ee081cc62c5b21a3a
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2619245
> Commit-Queue: Nancy Wang <nancylingwang@chromium.org>
> Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#843901}

TBR=xiyuan@chromium.org,chromium-scoped@luci-project-accounts.iam.gserviceaccount.com,nancylingwang@chromium.org

Change-Id: Icc6cc9ccbf6fcb0759bf2d03efd2d25a31d90d44
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1146900
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2632606Reviewed-by: Anatoliy Potapchuk <apotapchuk@chromium.org>
Commit-Queue: Anatoliy Potapchuk <apotapchuk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#844015}

chrome/test/BUILD.gn

@@ -2505,7 +2505,6 @@ if (!is_android) {
         "../browser/chromeos/file_manager/video_player_browsertest.cc",
         "../browser/chromeos/file_manager/video_player_jstest.cc",
         "../browser/chromeos/first_run/drive_first_run_browsertest.cc",
-        "../browser/chromeos/full_restore/app_launch_handler_browsertest.cc",
         "../browser/chromeos/input_method/input_method_engine_browsertests.cc",
         "../browser/chromeos/input_method/native_input_method_engine_browsertest.cc",
         "../browser/chromeos/input_method/textinput_browsertest.cc",