synchronizer: remove warning about improperly sorted histories

Not sure if it is still useful but in its current form it was giving false positives all the time.
Specifically, the expected sorting is: confirmed txns in blockchain order + mempool txns in arbitrary order.
The "sorted" invocation puts mempool txns at the beginning, so the warning is always triggered if there is any unconfirmed history.

lib/synchronizer.py

@@ -124,11 +124,6 @@ class Synchronizer(ThreadJob):
         # tx_fees
         tx_fees = [(item['tx_hash'], item.get('fee')) for item in result]
         tx_fees = dict(filter(lambda x:x[1] is not None, tx_fees))
-        # Note if the server hasn't been patched to sort the items properly
-        if hist != sorted(hist, key=lambda x:x[1]):
-            interface = self.network.interface
-            # note: we don't actually know which interface was used if it was *just* changed
-            if interface: interface.print_error("serving improperly sorted address histories")
         # Check that txids are unique
         if len(hashes) != len(result):
             self.print_error("error: server history has non-unique txids: %s"% addr)