remove custom config

Author: kumaryash90

packages/thirdweb/src/contract/deployment/utils/create-2-factory.ts

@@ -317,10 +317,6 @@ const CUSTOM_GAS_FOR_CHAIN: Record<string, CustomChain> = {
     name: "Europa",
     gasPrice: 110000n,
   },
-  "2020": {
-    name: "Ronin",
-    gasPrice: 110n * 10n ** 9n,
-  },
 };
 
 const FACTORIES: Record<string, string> = {