[CQ] Remove pkg-linux-release from the CQ trybots until it is fixed

Change-Id: I17ee0bfc26af1d060fc6f129419239e4a790034a
Reviewed-on: https://dart-review.googlesource.com/65120
Reviewed-by: Jonas Termansen <sortie@google.com>
diff --git a/tools/infra/config/cq.cfg b/tools/infra/config/cq.cfg
index 74b7c37..f6d7009 100644
--- a/tools/infra/config/cq.cfg
+++ b/tools/infra/config/cq.cfg
@@ -28,7 +28,7 @@
       builders { name: "dart2js-unit-linux-x64-release-try" }
       builders { name: "ddc-linux-release-chrome-try" }
       builders { name: "front-end-linux-release-x64-try" }
-      builders { name: "pkg-linux-release-try" }
+      builders { name: "pkg-linux-release-try" experiment_percentage: 100}
       builders { name: "vm-canary-linux-debug-try" }
       builders { name: "vm-kernel-linux-release-simdbc64-try" }
       builders { name: "vm-kernel-linux-release-x64-try" }