refactor[contracts]: remove one-off GasPriceOracle deployment file (#1046)

* refactor[contracts]: remove one-off gpo deployment

* chore: add changeset

.changeset/real-pumpkins-shop.md

+---
+'@eth-optimism/contracts': patch
+---
+
+Removes one-off GasPriceOracle deployment file

packages/contracts/deploy-l2/000-OVM_GasPriceOracle.deploy.ts

-/* Imports: External */
-import { DeployFunction } from 'hardhat-deploy/dist/types'
-
-/* Imports: Internal */
-import { getContractDefinition } from '../src'
-
-const deployFn: DeployFunction = async (hre: any) => {
-  const { deployments, getNamedAccounts } = hre
-  const { deploy } = deployments
-  const { deployer } = await getNamedAccounts()
-
-  const gasPriceOracle = getContractDefinition('OVM_GasPriceOracle', true)
-
-  const gasOracleOwner = (hre as any).deployConfig.ovmSequencerAddress
-  const initialGasPrice = (hre as any).deployConfig.initialGasPriceOracleGasPrice
-
-  if (!gasOracleOwner || !initialGasPrice) {
-    throw new Error('initialGasPrice & ovmSequencerAddress required to deploy gas price oracle')
-  }
-
-  await deploy('OVM_GasPriceOracle', {
-    contract: gasPriceOracle,
-    from: deployer,
-    args: [gasOracleOwner, initialGasPrice],
-    log: true,
-  });
-}
-
-deployFn.tags = ['OVM_GasPriceOracle']
-
-export default deployFn

packages/contracts/tasks/deploy.ts

@@ -99,12 +99,6 @@ task('deploy')
     undefined,
     types.string
   )
-  .addOptionalParam(
-    'initialGasPriceOracleGasPrice',
-    'The initial execution price for the gas price oracle.',
-    undefined,
-    types.int
-  )
   .setAction(async (args, hre: any, runSuper) => {
     // Necessary because hardhat doesn't let us attach non-optional parameters to existing tasks.
     const validateAddressArg = (argName: string) => {