CoinZoom: Remove unused code in order book

hummingbot/connector/exchange/coinzoom/coinzoom_active_order_tracker.pxd

@@ -9,4 +9,5 @@ cdef class CoinzoomActiveOrderTracker:
 
     cdef tuple c_convert_diff_message_to_np_arrays(self, object message)
     cdef tuple c_convert_snapshot_message_to_np_arrays(self, object message)
-    cdef np.ndarray[np.float64_t, ndim=1] c_convert_trade_message_to_np_array(self, object message)
+    # This method doesn't seem to be used anywhere at all
+    # cdef np.ndarray[np.float64_t, ndim=1] c_convert_trade_message_to_np_array(self, object message)

hummingbot/connector/exchange/coinzoom/coinzoom_active_order_tracker.pyx

@@ -135,14 +135,14 @@ cdef class CoinzoomActiveOrderTracker:
 
         return bids, asks
 
-    # Is this method actually used?
-    cdef np.ndarray[np.float64_t, ndim=1] c_convert_trade_message_to_np_array(self, object message):
-        cdef:
-            double trade_type_value = 1.0 if message.content[4] == "BUY" else 2.0
-            list content = message.content
-
-        return np.array([message.timestamp, trade_type_value, float(content[1]), float(content[2])],
-                        dtype="float64")
+    # This method doesn't seem to be used anywhere at all
+    # cdef np.ndarray[np.float64_t, ndim=1] c_convert_trade_message_to_np_array(self, object message):
+    #     cdef:
+    #         double trade_type_value = 1.0 if message.content[4] == "BUY" else 2.0
+    #         list content = message.content
+
+    #     return np.array([message.timestamp, trade_type_value, float(content[1]), float(content[2])],
+    #                     dtype="float64")
 
     def convert_diff_message_to_order_book_row(self, message):
         np_bids, np_asks = self.c_convert_diff_message_to_np_arrays(message)

hummingbot/connector/exchange/coinzoom/coinzoom_order_book_message.py

@@ -47,6 +47,11 @@ def trade_id(self) -> int:
     def trading_pair(self) -> str:
         return self.content["trading_pair"]
 
+    # The `asks` and `bids` properties are only used in the methods below.
+    # They are all replaced or unused in this connector:
+    #     OrderBook.restore_from_snapshot_and_diffs
+    #     OrderBookTracker._track_single_book
+    #     MockAPIOrderBookDataSource.get_tracking_pairs
     @property
     def asks(self):
         raise NotImplementedError(Constants.EXCHANGE_NAME + " order book uses active_order_tracker.")