Revert "Add quick view test for removable partitions."

This reverts commit 3968c5449ec5f431fb2d4a4096bf38cd3c984e3f.

Reason for revert:

Findit (https://goo.gl/kROfz5) identified CL at revision 629872 as the
culprit for flakes in the build cycles as shown on:
https://findit-for-me.appspot.com/waterfall/flake/flake-culprit?key=ag9zfmZpbmRpdC1mb3ItbWVyQwsSDEZsYWtlQ3VscHJpdCIxY2hyb21pdW0vMzk2OGM1NDQ5ZWM1ZjQzMWZiMmQ0YTQwOTZiZjM4Y2QzYzk4NGUzZgw

Sample Failed Build: https://ci.chromium.org/buildbot/chromium.memory/Linux%20Chromium%20OS%20ASan%20LSan%20Tests%20%281%29/31402

Sample Failed Step: webui_polymer2_browser_tests

Sample Flaky Test: QuickView/FilesAppBrowserTest.Test/openQuickViewRemovablePartitions

Original change's description:
> Add quick view test for removable partitions.
> 
> Bug: 918795
> Change-Id: I3ce85373b987f572e901889082d638035acf1235
> Reviewed-on: https://chromium-review.googlesource.com/c/1457557
> Commit-Queue: Alli Murray <alliemurray@google.com>
> Reviewed-by: Noel Gordon <noel@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#629872}

Change-Id: I8f69d1ee7321782bc3f1379e6d81dc24435c897f
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 918795
Reviewed-on: https://chromium-review.googlesource.com/c/1457922
Cr-Commit-Position: refs/heads/master@{#629896}
2 files changed