fix ElemCharacterTextSplitter version error

src/bisheng-langchain/bisheng_langchain/text_splitter.py

@@ -59,18 +59,16 @@ def __init__(
         self,
         separators: Optional[List[str]] = None,
         keep_separator: bool = True,
-        is_separator_regex: bool = False,
         **kwargs: Any,
     ) -> None:
         """Create a new TextSplitter."""
         super().__init__(
             separators=separators,
             keep_separator=keep_separator,
-            is_separator_regex=is_separator_regex,
             **kwargs
         )
         self._separators = separators or ["\n\n", "\n", " ", ""]
-        self._is_separator_regex = is_separator_regex
+        self._is_separator_regex = False
 
     def split_documents(self, documents: Iterable[Document]) -> List[Document]:
         texts, metadatas = [], []
@@ -152,5 +150,3 @@ def create_documents(
                 documents.append(new_doc)
         return documents
 
-
-