contracts-bedrock: remove dead imports

The `Safe` and `SafeProxyFactory` were imported twice.
This commit simply deletes one of the sets of imports so
the contracts are only imported once.

packages/contracts-bedrock/scripts/Deploy.s.sol

@@ -15,8 +15,6 @@ import { Deployer } from "scripts/Deployer.sol";
 import "scripts/Deployer.sol";
 import { DeployConfig } from "scripts/DeployConfig.s.sol";
 
-import { Safe } from "safe-contracts/Safe.sol";
-import { SafeProxyFactory } from "safe-contracts/proxies/SafeProxyFactory.sol";
 import { ProxyAdmin } from "src/universal/ProxyAdmin.sol";
 import { AddressManager } from "src/legacy/AddressManager.sol";
 import { Proxy } from "src/universal/Proxy.sol";