diff --git a/contracts/exchange/contracts/src/interfaces/IMatchOrders.sol b/contracts/exchange/contracts/src/interfaces/IMatchOrders.sol
index fd8b67373f..9bcfcfd37d 100644
--- a/contracts/exchange/contracts/src/interfaces/IMatchOrders.sol
+++ b/contracts/exchange/contracts/src/interfaces/IMatchOrders.sol
@@ -60,26 +60,6 @@ contract IMatchOrders {
         public
         returns (LibFillResults.BatchMatchedFillResults memory batchMatchedFillResults);
 
-    /// @dev Calculates fill amounts for the matched orders.
-    ///      Each order is filled at their respective price point. However, the calculations are
-    ///      carried out as though the orders are both being filled at the right order's price point.
-    ///      The profit made by the leftOrder order goes to the taker (who matched the two orders).
-    /// @param leftOrder First order to match.
-    /// @param rightOrder Second order to match.
-    /// @param leftOrderTakerAssetFilledAmount Amount of left order already filled.
-    /// @param rightOrderTakerAssetFilledAmount Amount of right order already filled.
-    /// @param matchedFillResults Amounts to fill and fees to pay by maker and taker of matched orders.
-    function calculateMatchedFillResults(
-        LibOrder.Order memory leftOrder,
-        LibOrder.Order memory rightOrder,
-        uint256 leftOrderTakerAssetFilledAmount,
-        uint256 rightOrderTakerAssetFilledAmount,
-        bool shouldMaximallyFillOrders
-    )
-        public
-        pure
-        returns (LibFillResults.MatchedFillResults memory matchedFillResults);
-
     /// @dev Match two complementary orders that have a profitable spread.
     ///      Each order is filled at their respective price point. However, the calculations are
     ///      carried out as though the orders are both being filled at the right order's price point.