Marks Linux plugin_dependencies_test to be unflaky (#87046)

diff --git a/.ci.yaml b/.ci.yaml
index c50176b..e0b1b1c 100755
--- a/.ci.yaml
+++ b/.ci.yaml
@@ -231,7 +231,6 @@
 
   - name: Linux plugin_dependencies_test
     builder: Linux plugin_dependencies_test
-    bringup: true
     properties:
       tags: >
         ["devicelab","hostonly"]