Remove incorrect final for non-virtual func (mlc-ai#34)

Author: vinx13

src/huggingface_tokenizer.cc

@@ -36,12 +36,11 @@ class HFTokenizer : public Tokenizer {
     return ret;
   }
 
-   // use i32 to be consistent with sentencepiece
-   std::vector<int32_t> Encode(const std::string& text) final {
-     return Encode(text, false);
-   }
+  // use i32 to be consistent with sentencepiece
+  std::vector<int32_t> Encode(const std::string& text) final { return Encode(text, false); }
 
-  std::vector<std::vector<int32_t>> EncodeBatch(const std::vector<std::string>& texts, bool add_special_tokens) final {
+  std::vector<std::vector<int32_t>> EncodeBatch(const std::vector<std::string>& texts,
+                                                bool add_special_tokens) {
     std::vector<const char*> texts_raw;
     std::vector<size_t> seq_lens;
     size_t num_seqs = texts.size();
@@ -78,9 +77,7 @@ class HFTokenizer : public Tokenizer {
     return std::string(data, len);
   }
 
-  std::string Decode(const std::vector<int32_t>& ids) final {
-    return Decode(ids, false);
-  }
+  std::string Decode(const std::vector<int32_t>& ids) final { return Decode(ids, false); }
 
   size_t GetVocabSize() final {
     size_t size;