fix: remove unused variable in topological sorting

Eliminated an unused variable `node` during stack popping.
Improves code clarity without modifying functionality.

diff --git a/lib/sqlalchemy/util/topological.py b/lib/sqlalchemy/util/topological.py
index 393c855abca87075e3762839fa45c60f6b3ac0b0..82f22a01957051000654b2c5f927626f3d81d55b 100644 (file)
--- a/lib/sqlalchemy/util/topological.py
+++ b/lib/sqlalchemy/util/topological.py
@@ -112,7 +112,7 @@ def find_cycles(
                     todo.remove(node)
                     break
             else:
-                node = stack.pop()
+                stack.pop()
     return output