Fix formatting issue in UnstableToStableBackend class by removing unnecessary blank lines in the vector norm conversion method.

Author: playaswd

graph_net/torch/backend/unstable_to_stable_backend.py

@@ -130,6 +130,7 @@ def _impl_unstable_to_stable_linalg_vector_norm(self, gm):
         """
         Convert torch._C._linalg.linalg_vector_norm to torch.linalg.vector_norm
         """
+
         def replace_in_graph(graph_mod):
             # Update graph nodes: replace torch._C._linalg.linalg_vector_norm with torch.linalg.vector_norm
             for node in graph_mod.graph.nodes:
@@ -141,7 +142,7 @@ def replace_in_graph(graph_mod):
                         and node.target.__name__ == "linalg_vector_norm"
                     ):
                         node.target = torch.linalg.vector_norm
-            
+
             # Validate and recompile the graph
             graph_mod.graph.lint()
             graph_mod.recompile()