Merge pull request #1092 from pagespeed/jmarantz-ipro-flow-cache-not-flaky

remove 'IPRO flow uses cache as expected' from flaky-list, ...
diff --git a/test/nginx_system_test.sh b/test/nginx_system_test.sh
index 49e977d..e882b06 100644
--- a/test/nginx_system_test.sh
+++ b/test/nginx_system_test.sh
@@ -332,7 +332,6 @@
 ~combine_css Maximum size of combined CSS.~
 ~prioritize_critical_css~
 ~prioritize_critical_css Able to read POST data from temp file.~
-~IPRO flow uses cache as expected.~
 ~IPRO flow doesn't copy uncacheable resources multiple times.~
 ~inline_unauthorized_resources allows unauthorized css selectors~
 "
@@ -1324,6 +1323,7 @@
     | grep -v "\\[warn\\].*remote\.cfg.*" \
     | grep -v "\\[warn\\].*end token not received.*" \
     | grep -v "\\[warn\\].*failed to hook next event.*" \
+    | grep -v "\\[warn\\].*Fetch timed out:.*" \
     || true)
 
 check [ -z "$OUT" ]