Add ruff, remove black, isort, flake8, pylint (#3092)

* black, isort, flake8 -> ruff

* remove unused

* add back needed import

* fix

tests/e2e/multigpu/test_fsdp2.py

@@ -1,7 +1,5 @@
 """Test module for FSDP2 multi-GPU functionality."""
 
-# pylint: disable=duplicate-code
-
 import os
 from pathlib import Path
 
@@ -29,9 +27,9 @@ def verify_training_success(temp_dir):
     assert len(model_files) > 0, "No model files found - training may have failed"
 
     checkpoint_files = list(output_path.glob("checkpoint-*"))
-    assert (
-        len(checkpoint_files) > 0
-    ), "No checkpoint files found - training may have failed"
+    assert len(checkpoint_files) > 0, (
+        "No checkpoint files found - training may have failed"
+    )
 
     tb_log_path = most_recent_subdir(temp_dir + "/runs")
     if tb_log_path:
@@ -43,9 +41,9 @@ def verify_training_success(temp_dir):
             train_loss_df = df[df.tag == "train/train_loss"]
             if len(train_loss_df) > 0:
                 final_loss = train_loss_df.value.values[-1]
-                assert not torch.isnan(
-                    torch.tensor(final_loss)
-                ), f"Training loss is NaN: {final_loss}"
+                assert not torch.isnan(torch.tensor(final_loss)), (
+                    f"Training loss is NaN: {final_loss}"
+                )
 
 
 class TestFSDP2: