Small cleanup (compound-finance#439)

This PR removes some outdated XXXs and fills in the license for some test contracts.

contracts/ConfiguratorProxy.sol

@@ -13,7 +13,6 @@ contract ConfiguratorProxy is TransparentUpgradeableProxy {
      */
     constructor(address _logic, address _admin, bytes memory _data) payable TransparentUpgradeableProxy(_logic, _admin, _data) {}
 
-    // XXX triple check!
     /**
      * @dev Overrides the TransparentUpgradeableProxy's _beforeFallback so admin can call the implementation.
      */

contracts/test/EvilToken.sol

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: XXX
+// SPDX-License-Identifier: BUSL-1.1
 pragma solidity 0.8.15;
 
 import "./../ERC20.sol";

contracts/test/FaucetToken.sol

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: XXX
+// SPDX-License-Identifier: BUSL-1.1
 pragma solidity 0.8.15;
 
 /**

contracts/test/FaucetWETH.sol

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: XXX
+// SPDX-License-Identifier: BUSL-1.1
 pragma solidity 0.8.15;
 
 import "../vendor/canonical-weth/contracts/WETH9.sol";

hardhat.config.ts

@@ -87,8 +87,8 @@ function setupDefaultNetworkProviders(hardhatConfig: HardhatUserConfig) {
       accounts: ETH_PK
         ? [ETH_PK]
         : {
-            mnemonic: MNEMONIC,
-          },
+          mnemonic: MNEMONIC,
+        },
     };
   }
 }

plugins/scenario/utils/TokenSourcer.ts

@@ -52,7 +52,6 @@ async function removeTokens(
   });
 }
 
-// XXX make sure we don't source tokens directly from the protocol
 async function addTokens(
   hre: HardhatRuntimeEnvironment,
   amount: BigNumber,