Disable flaky StorageMonitorLinuxTest.Removable

TBR=tommycli

Bug: 1012211
Change-Id: I81816b35680dd3be345e2b699779663cc11bdd74
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1852784Reviewed-by: David Roger <droger@chromium.org>
Commit-Queue: David Roger <droger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#704597}

components/storage_monitor/storage_monitor_linux_unittest.cc

@@ -337,7 +337,8 @@ TEST_F(StorageMonitorLinuxTest, BasicAttachDetach) {
 }
 
 // Only removable devices are recognized.
-TEST_F(StorageMonitorLinuxTest, Removable) {
+// This test is flaky, see https://crbug.com/1012211
+TEST_F(StorageMonitorLinuxTest, DISABLED_Removable) {
   base::FilePath test_path_a = CreateMountPointWithDCIMDir(kMountPointA);
   ASSERT_FALSE(test_path_a.empty());
   MtabTestData test_data1[] = {