[iOS] Disable testIncognitoSeparation

The test is failing on the iOS13 beta bot.

TBR= stkhapugin@chromium.org

Bug: 1045950
Change-Id: I572729c0d26bab9af450779c18b3c9d264530c83
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2041447Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Commit-Queue: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#738946}

ios/chrome/browser/ui/omnibox/popup/omnibox_popup_egtest.mm

@@ -164,13 +164,8 @@ std::unique_ptr<net::test_server::HttpResponse> StandardResponse(
 
 // Tests that the incognito tabs aren't displayed as "opened" tab in the
 // non-incognito suggestions and vice-versa.
-// TODO(crbug.com/1045950): fix and reenable on devices.
-#if !TARGET_IPHONE_SIMULATOR
-#define MAYBE_testIncognitoSeparation DISABLED_testIncognitoSeparation
-#else
-#define MAYBE_testIncognitoSeparation testIncognitoSeparation
-#endif
-- (void)MAYBE_testIncognitoSeparation {
+// TODO(crbug.com/1045950): fix and reenable.
+- (void)DISABLED_testIncognitoSeparation {
   GURL URL1 = self.testServer->GetURL(kPage1URL);
   GURL URL2 = self.testServer->GetURL(kPage2URL);
   GURL URL3 = self.testServer->GetURL(kPage3URL);