Remove TODO comment + uniform style

Author: lorenzocesconetto

src/mcp/client/session.py

@@ -121,15 +121,11 @@ async def initialize(self) -> types.InitializeResult:
             if self._sampling_callback is not _default_sampling_callback
             else None
         )
-        if self._list_roots_callback is _default_list_roots_callback:
-            roots = None
-        else:
-            roots = types.RootsCapability(
-                # TODO: Should this be based on whether we
-                # _will_ send notifications, or only whether
-                # they're supported?
-                listChanged=True,
-            )
+        roots = (
+            types.RootsCapability(listChanged=True)
+            if self._list_roots_callback is not _default_list_roots_callback
+            else None
+        )
 
         result = await self.send_request(
             types.ClientRequest(