diff --git a/libp2p/transport/upgrader.py b/libp2p/transport/upgrader.py
index 8b47fff4..40ba5321 100644
--- a/libp2p/transport/upgrader.py
+++ b/libp2p/transport/upgrader.py
@@ -1,9 +1,7 @@
 from libp2p.abc import (
-    IListener,
     IMuxedConn,
     IRawConnection,
     ISecureConn,
-    ITransport,
 )
 from libp2p.custom_types import (
     TMuxerOptions,
@@ -43,10 +41,6 @@ class TransportUpgrader:
         self.security_multistream = SecurityMultistream(secure_transports_by_protocol)
         self.muxer_multistream = MuxerMultistream(muxer_transports_by_protocol)
 
-    def upgrade_listener(self, transport: ITransport, listeners: IListener) -> None:
-        """Upgrade multiaddr listeners to libp2p-transport listeners."""
-        # TODO: Figure out what to do with this function.
-
     async def upgrade_security(
         self,
         raw_conn: IRawConnection,
diff --git a/newsfragments/883.internal.rst b/newsfragments/883.internal.rst
new file mode 100644
index 00000000..a9ca3a0e
--- /dev/null
+++ b/newsfragments/883.internal.rst
@@ -0,0 +1,5 @@
+Remove unused upgrade_listener function from transport upgrader
+
+- Remove unused `upgrade_listener` function from `libp2p/transport/upgrader.py` (Issue 2 from #726)
+- Clean up unused imports related to the removed function
+- Improve code maintainability by removing dead code