remove unused method

lib/wallet.py

@@ -613,16 +613,6 @@ class Wallet:
 
         return result
 
-    def get_transactions_at_height(self, height):
-        with self.lock:
-            values = self.transactions.values()[:]
-
-        out = []
-        for tx in values:
-            if tx['height'] == height:
-                out.append(tx['tx_hash'])
-        return out
-
 
     def get_label(self, tx_hash):
         label = self.labels.get(tx_hash)
@@ -630,6 +620,7 @@ class Wallet:
         if is_default: label = self.get_default_label(tx_hash)
         return label, is_default
 
+
     def get_default_label(self, tx_hash):
         tx = self.transactions.get(tx_hash)
         default_label = ''