Add landing page to md-pages branch

The md-pages branch is served on catapult.gsrc.io, and we don't have a
good way to automatically keep this branch up-to-date right now. Until we
do, this CL leaves a landing pages that points to googlesource.

Please note that the bug line below is only to satisfy the out-of-date
PRESUBMIT.py on the branch.

BUG=catapult:#1234
Change-Id: I7a09922cde0b081cfb4f8a73e867bddfbb8ff3c0
Reviewed-on: https://chromium-review.googlesource.com/772846
Reviewed-by: Annie Sullivan <sullivan@chromium.org>
Reviewed-by: Ned Nguyen <nednguyen@google.com>
diff --git a/index.md b/index.md
index 1f0fa83..2ea530e 100644
--- a/index.md
+++ b/index.md
@@ -3,23 +3,6 @@
      Use of this source code is governed by a BSD-style license that can be
      found in the LICENSE file.
 -->
-Catapult
-========
-
-Catapult is the home for several performance tools that span from gathering,
-displaying and analyzing performance data. This includes:
-
- * [Trace-viewer](/tracing/README.md)
- * [Performance Insights](/perf_insights/README.md)
- * [Telemetry](/telemetry/README.md)
- * [Performance Dashboard](/dashboard/README.md)
-
-These tools were created by Chromium developers for performance analysis,
-testing, and monitoring of Chrome, but they can also be used for analyzing and
-monitoring websites, and eventually Android apps.
-
-Contributing
-============
-Please see [our contributor's guide](CONTRIBUTING.md)
-
-**[Current build status](https://build.chromium.org/p/client.catapult/waterfall)**
+Catapult documentation has moved. Please consult
+[chromium.googlesource.com](https://chromium.googlesource.com/catapult/+/HEAD/README.md)
+for up-to-date documentation.