Migrate metric to Evaluate in Pytorch examples (#18369)

* Migrate metric to Evaluate in pytorch examples

* Remove unused imports

examples/pytorch/token-classification/run_ner.py

@@ -27,8 +27,9 @@ from typing import Optional
 
 import datasets
 import numpy as np
-from datasets import ClassLabel, load_dataset, load_metric
+from datasets import ClassLabel, load_dataset
 
+import evaluate
 import transformers
 from transformers import (
     AutoConfig,
@@ -504,7 +505,7 @@ def main():
     data_collator = DataCollatorForTokenClassification(tokenizer, pad_to_multiple_of=8 if training_args.fp16 else None)
 
     # Metrics
-    metric = load_metric("seqeval")
+    metric = evaluate.load("seqeval")
 
     def compute_metrics(p):
         predictions, labels = p