diff --git a/Western US/config.json b/Western US/config.json
index 261f9b1..697dad3 100644
--- a/Western US/config.json	
+++ b/Western US/config.json	
@@ -12,9 +12,6 @@
     "truncationLevel": 3.0,
     "imts": ["PGA", "SA0P2", "SA1P0"],
     "gmmUncertainty": true
-  },
-  "performance": {
-    "optimizeGrids": true
   }
 }