contracts-bedrock: remove ownable from GasPriceOracle

The `onlyOwner` modifier was no longer used

packages/contracts-bedrock/contracts/L2/GasPriceOracle.sol

@@ -2,7 +2,6 @@
 pragma solidity 0.8.15;
 
 import { Semver } from "../universal/Semver.sol";
-import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
 import { Predeploys } from "../libraries/Predeploys.sol";
 import { L1Block } from "../L2/L1Block.sol";
 
@@ -16,7 +15,14 @@ import { L1Block } from "../L2/L1Block.sol";
  *         contract exposes an API that is useful for knowing how large the L1 portion of their
  *         transaction fee will be.
  */
-contract GasPriceOracle is Ownable, Semver {
+contract GasPriceOracle is Semver {
+    /**
+     * @custom:legacy
+     * @custom:spacer _owner
+     * @notice Spacer for backwards compatibility.
+     */
+    uint256 private spacer_0_0_32;
+
     /**
      * @custom:legacy
      * @custom:spacer gasPrice
@@ -67,12 +73,8 @@ contract GasPriceOracle is Ownable, Semver {
 
     /**
      * @custom:semver 0.0.1
-     *
-     * @param _owner Address that will initially own this contract.
      */
-    constructor(address _owner) Ownable() Semver(0, 0, 1) {
-        transferOwnership(_owner);
-    }
+    constructor() Semver(0, 0, 1) {}
 
     /**
      * @notice Computes the L1 portion of the fee based on the size of the rlp encoded input

packages/contracts-bedrock/contracts/test/GasPriceOracle.t.sol

@@ -35,7 +35,7 @@ contract GasPriceOracle_Test is CommonTest {
         // We are not setting the gas oracle at its predeploy
         // address for simplicity purposes. Nothing in this test
         // requires it to be at a particular address
-        gasOracle = new GasPriceOracle(alice);
+        gasOracle = new GasPriceOracle();
 
         vm.prank(depositor);
         l1Block.setL1BlockValues({
@@ -50,11 +50,6 @@ contract GasPriceOracle_Test is CommonTest {
         });
     }
 
-    function test_owner() external {
-        // alice is passed into the constructor of the gasOracle
-        assertEq(gasOracle.owner(), alice);
-    }
-
     function test_l1BaseFee() external {
         assertEq(gasOracle.l1BaseFee(), basefee);
     }
@@ -80,7 +75,6 @@ contract GasPriceOracle_Test is CommonTest {
     }
 
     function test_setGasPriceReverts() external {
-        vm.prank(gasOracle.owner());
         (bool success, bytes memory returndata) = address(gasOracle).call(
             abi.encodeWithSignature("setGasPrice(uint256)", 1)
         );
@@ -90,7 +84,6 @@ contract GasPriceOracle_Test is CommonTest {
     }
 
     function test_setL1BaseFeeReverts() external {
-        vm.prank(gasOracle.owner());
         (bool success, bytes memory returndata) = address(gasOracle).call(
             abi.encodeWithSignature("setL1BaseFee(uint256)", 1)
         );

packages/contracts-bedrock/layout-lock.json

 {
   "GasPriceOracle": {
+    "spacer_0_0_32": {
+      "slot": 0,
+      "offset": 0,
+      "length": 32
+    },
     "spacer_1_0_32": {
       "slot": 1,
       "offset": 0,