Revert "Marking SiteSettingsTest.testClearDomainCookies as flaky test."

This reverts commit 1d4d72e9.

Reason for revert: I don't see flakiness on testers for trunk. Maybe the issue got fixed already and only exists in M85.

Original change's description:
> Marking SiteSettingsTest.testClearDomainCookies as flaky test.
> 
> TBR=dullweber@chromium.org
> 
> Bug: 1112409
> Change-Id: Idf31c4a8d709ddc3f4f87cff63d63881f0198424
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2346853
> Reviewed-by: Ben Mason <benmason@chromium.org>
> Commit-Queue: Ben Mason <benmason@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#796524}

TBR=benmason@chromium.org

Change-Id: Idbbd6d8947bc9d986a16ccd094775e49bd7243d4
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1112409
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2348769Reviewed-by: Christian Dullweber <dullweber@chromium.org>
Commit-Queue: Christian Dullweber <dullweber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#796769}

chrome/android/javatests/src/org/chromium/chrome/browser/site_settings/SiteSettingsTest.java

@@ -30,7 +30,6 @@ import org.chromium.base.test.util.CommandLineFlags;
 import org.chromium.base.test.util.DisableIf;
 import org.chromium.base.test.util.DisabledTest;
 import org.chromium.base.test.util.Feature;
-import org.chromium.base.test.util.FlakyTest;
 import org.chromium.chrome.browser.flags.ChromeSwitches;
 import org.chromium.chrome.browser.notifications.channels.ChromeChannelDefinitions;
 import org.chromium.chrome.browser.notifications.channels.SiteChannelsManager;
@@ -480,7 +479,6 @@ public class SiteSettingsTest {
     @Test
     @SmallTest
     @Feature({"Preferences"})
-    @FlakyTest(message = "https://crbug.com/1112409")
     public void testClearDomainCookies() throws Exception {
         final String url = mPermissionRule.getURLWithHostName(
                 "test.example.com", "/chrome/test/data/android/cookie.html");