Remove import of Optimism contracts

contracts/token/FortaBridgedBaseSepolia.sol

@@ -3,9 +3,26 @@
 
 pragma solidity ^0.8.9;
 
-import "@eth-optimism/contracts-bedrock/src/universal/IOptimismMintableERC20.sol";
+import "@openzeppelin/contracts/utils/introspection/IERC165.sol";
 import "./FortaCommon.sol";
 
+/**
+ * Interface necessary to implement for successful bridging
+ * from Ethereum mainnet to OP-stack chains, which for us
+ * would be the Base Sepolia testnet.
+ * Detailed here:
+ * https://docs.optimism.io/builders/app-developers/bridging/standard-bridge#bridged-tokens
+ */
+interface IOptimismMintableERC20 is IERC165 {
+    function remoteToken() external view returns (address);
+
+    function bridge() external returns (address);
+
+    function mint(address _to, uint256 _amount) external;
+
+    function burn(address _from, uint256 _amount) external;
+}
+
 /**
  * This version of the Forta token is living on the Base Sepolia Layer 2 testnet.
  *

package.json

@@ -22,7 +22,6 @@
   },
   "dependencies": {
     "@ensdomains/ens-contracts": "^0.0.7",
-    "@eth-optimism/contracts-bedrock": "^0.17.2",
     "@gnosis.pm/safe-ethers-lib": "^1.1.0",
     "@openzeppelin/contracts": "4.7.0",
     "@openzeppelin/contracts-upgradeable": "4.7.0"

yarn.lock

@@ -407,11 +407,6 @@
   "resolved" "https://registry.npmjs.org/@eslint/js/-/js-8.41.0.tgz"
   "version" "8.41.0"
 
-"@eth-optimism/contracts-bedrock@^0.17.2":
-  "integrity" "sha512-YVwPHpBZgFwFX9qY8+iToVAAH7mSnVIVmih+YfHhqjAhlLvLZfYjvj+hRNgcB9eRyl1SOOB0jevp4JOOV1v2BA=="
-  "resolved" "https://registry.npmjs.org/@eth-optimism/contracts-bedrock/-/contracts-bedrock-0.17.2.tgz"
-  "version" "0.17.2"
-
 "@ethereum-waffle/chai@^3.4.4":
   "integrity" "sha512-/K8czydBtXXkcM9X6q29EqEkc5dN3oYenyH2a9hF7rGAApAJUpH8QBtojxOY/xQ2up5W332jqgxwp0yPiYug1g=="
   "resolved" "https://registry.npmjs.org/@ethereum-waffle/chai/-/chai-3.4.4.tgz"