Marks Mac_ios cubic_bezier_perf_ios_sksl_warmup__timeline_summary to be unflaky (#87052)

diff --git a/.ci.yaml b/.ci.yaml
index 26b58e3..afed5df 100755
--- a/.ci.yaml
+++ b/.ci.yaml
@@ -1926,7 +1926,6 @@
 
   - name: Mac_ios cubic_bezier_perf_ios_sksl_warmup__timeline_summary
     builder: Mac_ios cubic_bezier_perf_ios_sksl_warmup__timeline_summary
-    bringup: true
     presubmit: false
     properties:
       tags: >