Revert "Not always consider a local model a checkpoint in run_glue"

This reverts commit f3660613.

examples/text-classification/run_glue.py

@@ -406,15 +406,12 @@ def main():
 
     # Training
     if training_args.do_train:
-        checkpoint = None
         if last_checkpoint is not None:
             checkpoint = last_checkpoint
         elif os.path.isdir(model_args.model_name_or_path):
-            # Check the config from that potential checkpoint has the right number of labels before using it as a
-            # checkpoint.
-            if AutoConfig.from_pretrained(model_args.model_name_or_path).num_labels == num_labels:
-                checkpoint = model_args.model_name_or_path
-
+            checkpoint = model_args.model_name_or_path
+        else:
+            checkpoint = None
         train_result = trainer.train(resume_from_checkpoint=checkpoint)
         metrics = train_result.metrics