remove migration script (moving to a separate branch)

contracts/ETHTornado.sol

@@ -38,34 +38,4 @@ contract ETHTornado is Tornado {
       require(success, "payment to _relayer did not go thru");
     }
   }
-    /**
-    @dev Migrate state from old mixer to this one.
-    @param _commitments deposited commitments from previous contract
-    @param _nullifierHashes spent nullifiers from previous contract
-  */
-  bool public isMigrated = false;
-  function migrateState(bytes32[] calldata _commitments, bytes32[] calldata _nullifierHashes) external onlyOperator {
-    require(!isMigrated, "Migration is disabled");
-    for (uint32 i = 0; i < _commitments.length; i++) {
-      commitments[_commitments[i]] = true;
-      emit Deposit(_commitments[i], nextIndex + i, block.timestamp);
-    }
-
-    nextIndex += uint32(_commitments.length);
-
-    for (uint256 i = 0; i < _nullifierHashes.length; i++) {
-      nullifierHashes[_nullifierHashes[i]] = true;
-      emit Withdrawal(address(0), _nullifierHashes[i], address(0), 0);
-    }
-  }
-
-  function initializeTreeForMigration(bytes32[] calldata _filledSubtrees, bytes32 _root) external onlyOperator {
-    require(!isMigrated, "already migrated");
-    filledSubtrees = _filledSubtrees;
-    roots[0] = _root;
-  }
-
-  function finishMigration() external payable onlyOperator {
-    isMigrated = true;
-  }
 }