[CrOS MultiDevice] Remove erroneous </script> tag from mojo_api.html.

The tag had already been closed, so the extra tag was unneeded.

Change-Id: Ia933f018873167fa201c2d4fc3a1d2b4a0d39053
Reviewed-on: https://chromium-review.googlesource.com/1250056Reviewed-by: Jeremy Klein <jlklein@chromium.org>
Commit-Queue: Kyle Horimoto <khorimoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#594923}

ui/webui/resources/cr_components/chromeos/multidevice_setup/mojo_api.html

 <link rel="import" href="chrome://resources/html/cr.html">
 <script src="chrome://resources/js/mojo_bindings.js"></script>
-</script>
 <script src="chrome://resources/js/time.mojom.js"></script>
-<script src="chrome://resources/js/chromeos/device_sync.mojom.js">
-</script>
+<script src="chrome://resources/js/chromeos/device_sync.mojom.js"></script>
 <script src="chrome://resources/js/chromeos/multidevice_setup.mojom.js">
 </script>
 <script src="chrome://resources/js/chromeos/multidevice_setup_constants.mojom.js">