Update convert_hf_to_gguf.py

Author: ngxson

convert_hf_to_gguf.py

@@ -346,8 +346,6 @@ def prepare_tensors(self):
                         data_qtype = gguf.GGMLQuantizationType.BF16
                     elif self.ftype == gguf.LlamaFileType.MOSTLY_Q8_0:
                         data_qtype = gguf.GGMLQuantizationType.Q8_0
-                    elif self.ftype == gguf.LlamaFileType.MOSTLY_Q4_0:
-                        data_qtype = gguf.GGMLQuantizationType.Q4_0
                     elif self.ftype == gguf.LlamaFileType.MOSTLY_TQ1_0:
                         data_qtype = gguf.GGMLQuantizationType.TQ1_0
                     elif self.ftype == gguf.LlamaFileType.MOSTLY_TQ2_0: