Mark integration_ui_ios_textfield unflaky (#100661)

diff --git a/.ci.yaml b/.ci.yaml
index 4e9366d..ea2f6ae 100755
--- a/.ci.yaml
+++ b/.ci.yaml
@@ -3438,7 +3438,6 @@
     scheduler: luci
 
   - name: Mac_ios integration_ui_ios_textfield
-    bringup: true # Flaky https://github.com/flutter/flutter/issues/96787
     recipe: devicelab/devicelab_drone
     presubmit: false
     timeout: 60