Remove leftover scaled_fp8 key. (Comfy-Org#11603)

Author: comfyanonymous

comfy/utils.py

@@ -1230,6 +1230,8 @@ def convert_old_quants(state_dict, model_prefix="", metadata={}):
             out_sd = {}
             layers = {}
             for k in list(state_dict.keys()):
+                if k == scaled_fp8_key:
+                    continue
                 if not k.startswith(model_prefix):
                     out_sd[k] = state_dict[k]
                     continue