Update spliter

Signed-off-by: shiyu22 <shiyu.chen@zilliz.com>

__init__.py

@@ -1,5 +1,5 @@
 from .spliter import TextSpliter
 
 
-def text_loader(*args, **kwargs):
+def text_spliter(*args, **kwargs):
     return TextSpliter(*args, **kwargs)

requirements.txt

@@ -1,3 +1 @@
 langchain>=0.0.151
-unstructured
-pdf2image