[Devicelab] Temporarily remove testonly_devicelab_tests builder. (#64837)

diff --git a/dev/try_builders.json b/dev/try_builders.json
index 0163c8b..7e02589 100644
--- a/dev/try_builders.json
+++ b/dev/try_builders.json
@@ -97,12 +97,6 @@
         "repo": "flutter",
         "task_name": "win_tool_tests",
         "enabled":true
-      },
-      {
-        "name": "testonly_devicelab_tests",
-        "repo": "flutter",
-        "task_name": "testonly_devicelab_tests",
-        "enabled": true
       }
    ]
 }