Removing flaky since test failure is not reproduceable.

TNL-5691

common/test/acceptance/tests/lms/test_account_settings.py

@@ -256,7 +256,6 @@ class AccountSettingsPageTest(AccountSettingsTestMixin, WebAppTest):
         """
         self._test_readonly_field('username', 'Username', self.username)
 
-    @flaky  # TNL-5691
     def test_full_name_field(self):
         """
         Test behaviour of "Full Name" field.