feat: Change license to SPDX-License-Identifier: UNLICENSED everywhere

Remove unnecessary files

--- don't change below this line ---
ENG-4260 Took 13 minutes

foundry/test/TychoRouter.t.sol

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: UNLICENSED
+// SPDX-License-Identifier: BUSL-1.1
 pragma solidity ^0.8.26;
 
 import "@src/executors/UniswapV4Executor.sol";