Revert "Test Fix SettingRobolectricTest Fail"

This reverts commit 818f77cd1f.

Reason for revert: Underlying issue fixed in ag/23454315.

Bug: b/275023433
Test: atest SettingsGlobalRoboTests

Change-Id: I1af272efd00b3c5bd35310512f5712d5d1c7d834

tests/robotests/src/com/android/settings/users/UserSettingsTest.java

@@ -73,7 +73,6 @@ import com.android.settingslib.search.SearchIndexableRaw;
 
 import org.junit.After;
 import org.junit.Before;
-import org.junit.Ignore;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mockito.AdditionalMatchers;
@@ -262,7 +261,6 @@ public class UserSettingsTest {
                 eq(SettingsEnums.ACTION_USER_GUEST_EXIT_CONFIRMED));
     }
 
-    @Ignore
     @Test
     public void withDisallowRemoveUser_ShouldDisableRemoveUser() {
         // TODO(b/115781615): Tidy robolectric tests