[ios] Disable FormsTestCase.testPostFormEntryWithKeyboard

This test not only fails on simulator.
It also fails on:
https://ci.chromium.org/ui/p/chrome/builders/ci/ios-beta-device/2066/overview
https://ci.chromium.org/ui/p/chrome/builders/ci/ios14-beta-device/710/overview

TBR=eugenebut@chromium.org

Bug: 1147654
Change-Id: I8a7c0927d00b33a62cb3806e13d502f1484bede7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2587651Reviewed-by: edchin <edchin@chromium.org>
Reviewed-by: Eugene But <eugenebut@chromium.org>
Commit-Queue: edchin <edchin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#836334}

ios/chrome/browser/web/forms_egtest.mm

@@ -527,15 +527,8 @@ id<GREYMatcher> ResendPostButtonMatcher() {
 // Tests that submitting a POST-based form by tapping the 'Go' button on the
 // keyboard navigates to the correct URL and the back button works as expected
 // afterwards.
-// TODO:(crbug.com/1147654): re-enable after figuring out why it is failing on
-// simulator
-#if TARGET_IPHONE_SIMULATOR
-#define MAYBE_testPostFormEntryWithKeyboard \
-  DISABLE_testPostFormEntryWithKeyboard
-#else
-#define MAYBE_testPostFormEntryWithKeyboard testPostFormEntryWithKeyboard
-#endif
-- (void)MAYBE_testPostFormEntryWithKeyboard {
+// TODO:(crbug.com/1147654): re-enable after figuring out why it is failing.
+- (void)DISABLE_testPostFormEntryWithKeyboard {
   // Test fails on iPad Air 2 13.4 crbug.com/1102608.
   if ([ChromeEarlGrey isIPadIdiom] && base::ios::IsRunningOnOrLater(13, 0, 0)) {
     EARL_GREY_TEST_DISABLED(@"Fails in iOS 13 on iPads.");