Fix wrong type checking in `convert_diffusers_to_original_stable_diffusion.py` (#1681)

* Fix type checking remainders

* Remove IS_V20_MODEL flag always being True
Co-authored-by: apolinario <joaopaulo.passos+multimodal@gmail.com>

scripts/convert_diffusers_to_original_stable_diffusion.py

@@ -209,7 +209,7 @@ textenc_pattern = re.compile("|".join(protected.keys()))
 code2idx = {"q": 0, "k": 1, "v": 2}
 
 
-def convert_text_enc_state_dict_v20(text_enc_dict: dict[str, torch.Tensor]):
+def convert_text_enc_state_dict_v20(text_enc_dict):
     new_state_dict = {}
     capture_qkv_weight = {}
     capture_qkv_bias = {}
@@ -256,12 +256,10 @@ def convert_text_enc_state_dict_v20(text_enc_dict: dict[str, torch.Tensor]):
     return new_state_dict
 
 
-def convert_text_enc_state_dict(text_enc_dict: dict[str, torch.Tensor]):
+def convert_text_enc_state_dict(text_enc_dict):
     return text_enc_dict
 
 
-IS_V20_MODEL = True
-
 if __name__ == "__main__":
     parser = argparse.ArgumentParser()