refactor: Remove unused network name param from contract deploy configs (#2519)

* refactor: Remove unused network name param from contract deploy configs

* chore: Add changeset
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

.changeset/swift-flies-care.md

+---
+'@eth-optimism/contracts': patch
+---
+
+Remove unused network name parameter in contract deploy configs

packages/contracts/deploy-config/goerli-nightly.ts

 import { DeployConfig } from '../src/deploy-config'
 
 const config: DeployConfig = {
-  network: 'goerli-nightly',
   l1BlockTimeSeconds: 15,
   l2BlockGasLimit: 15_000_000,
   l2ChainId: 421,

packages/contracts/deploy-config/goerli.ts

 import { DeployConfig } from '../src/deploy-config'
 
 const config: DeployConfig = {
-  network: 'goerli',
   l1BlockTimeSeconds: 15,
   l2BlockGasLimit: 15_000_000,
   l2ChainId: 420,

packages/contracts/deploy-config/kovan.ts

 import { DeployConfig } from '../src/deploy-config'
 
 const config: DeployConfig = {
-  network: 'kovan',
   numDeployConfirmations: 1,
   gasPrice: 5_000_000_000,
   l1BlockTimeSeconds: 15,

packages/contracts/deploy-config/local.ts

 import { DeployConfig } from '../src/deploy-config'
 
 const config: DeployConfig = {
-  network: 'local',
   l1BlockTimeSeconds: 15,
   l2BlockGasLimit: 15_000_000,
   l2ChainId: 17,

packages/contracts/deploy-config/mainnet.ts

 import { DeployConfig } from '../src/deploy-config'
 
 const config: DeployConfig = {
-  network: 'mainnet',
   numDeployConfirmations: 4,
   gasPrice: 150_000_000_000,
   l1BlockTimeSeconds: 15,

packages/contracts/src/deploy-config.ts

@@ -4,12 +4,6 @@ import { ethers } from 'ethers'
  * Defines the configuration for a deployment.
  */
 export interface DeployConfig {
-  /**
-   * Name of the network to deploy to. Must be the name of one of the networks listed in
-   * hardhat.config.ts.
-   */
-  network: string
-
   /**
    * Whether or not this network is a forked network.
    */
@@ -135,9 +129,6 @@ const configSpec: {
     default?: any
   }
 } = {
-  network: {
-    type: 'string',
-  },
   isForkedNetwork: {
     type: 'boolean',
     default: false,