remove op bnb specific address

Author: pedronfigueiredo

packages/transaction-controller/CHANGELOG.md

@@ -10,7 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 
 - Bump `@metamask/base-controller` from `^8.4.1` to `^8.4.2` ([#6917](https://github.com/MetaMask/core/pull/6917))
-- Improve OP Stack layer 1 fee estimation by fetching the supported chain list from the gas API with a static fallback and selecting chain-specific oracle contracts such as opBNB, making `Layer1GasFeeFlow.matchesTransaction` asynchronous to support remote lookups. ([#6899](https://github.com/MetaMask/core/pull/6899))
+- Improve OP Stack layer 1 fee estimation by fetching the supported chain list from the gas API with a static fallback, using the shared Optimism gas price oracle contract for all OP Stack networks, and making `Layer1GasFeeFlow.matchesTransaction` asynchronous to support remote lookups. ([#6899](https://github.com/MetaMask/core/pull/6899))
 
 ### Fixed
 

packages/transaction-controller/src/gas-flows/OptimismLayer1GasFeeFlow.ts

@@ -21,10 +21,6 @@ const FALLBACK_OPTIMISM_STACK_CHAIN_IDS: Hex[] = [
 const DEFAULT_OPTIMISM_GAS_PRICE_ORACLE_ADDRESS =
   '0x420000000000000000000000000000000000000F';
 
-// opBNB uses a different oracle
-const OPBNB_GAS_PRICE_ORACLE_ADDRESS =
-  '0xc0d3c0d3c0d3c0d3c0d3c0d3c0d3c0d3c0d3000f';
-
 type SupportedNetworksResponse = {
   fullSupport: number[];
   partialSupport: {
@@ -77,12 +73,6 @@ export class OptimismLayer1GasFeeFlow extends OracleLayer1GasFeeFlow {
   }
 
   protected override getOracleAddressForChain(chainId: Hex): Hex {
-    switch (chainId) {
-      case CHAIN_IDS.OPBNB:
-      case CHAIN_IDS.OPBNB_TESTNET:
-        return OPBNB_GAS_PRICE_ORACLE_ADDRESS as Hex;
-      default:
-        return DEFAULT_OPTIMISM_GAS_PRICE_ORACLE_ADDRESS as Hex;
-    }
+    return DEFAULT_OPTIMISM_GAS_PRICE_ORACLE_ADDRESS as Hex;
   }
 }