fix: resolve post-rebase compilation breaks

- BrokerLiquidator: drop duplicate receive() — master's d309fdc and the
  branch each declared an identical receive(); Solidity allows only one.
  The documented receive() at the end of the contract is kept, so the
  liquidator can still receive native BNB.
- BatchManagementUtils.t.sol: update _deployBroker() to the new LendingBroker
  2-arg constructor and 8-arg initialize (RELAYER/ORACLE moved from
  immutables to storage in 22bb8cf).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: ricklista

src/liquidator/BrokerLiquidator.sol

@@ -87,8 +87,6 @@ contract BrokerLiquidator is UUPSUpgradeable, AccessControlUpgradeable, IBrokerL
     _grantRole(BOT, bot);
   }
 
-  receive() external payable {}
-
   /// @dev withdraws ERC20 tokens.
   /// @param token The address of the token.
   /// @param amount The amount to withdraw.

test/utils/BatchManagementUtils.t.sol

@@ -160,10 +160,20 @@ contract BatchManagementUtilsTest is Test {
   }
 
   function _deployBroker() internal returns (LendingBroker b) {
-    LendingBroker impl = new LendingBroker(address(moolah), RELAYER_STUB, address(oracle), address(0));
+    LendingBroker impl = new LendingBroker(address(moolah), address(0));
     ERC1967Proxy proxy = new ERC1967Proxy(
       address(impl),
-      abi.encodeWithSelector(LendingBroker.initialize.selector, ADMIN, MANAGER, BOT, PAUSER, address(rateCalc), 10)
+      abi.encodeWithSelector(
+        LendingBroker.initialize.selector,
+        ADMIN,
+        MANAGER,
+        BOT,
+        PAUSER,
+        address(rateCalc),
+        10,
+        RELAYER_STUB,
+        address(oracle)
+      )
     );
     b = LendingBroker(payable(address(proxy)));
   }