diff --git a/libs/core/langchain_core/documents/base.py b/libs/core/langchain_core/documents/base.py
index 1dc9661c061..969ee49a174 100644
--- a/libs/core/langchain_core/documents/base.py
+++ b/libs/core/langchain_core/documents/base.py
@@ -234,7 +234,7 @@ class Blob(BaseMedia):
             `Blob` instance
         """
         if mime_type is None and guess_type:
-            mimetype = mimetypes.guess_type(path)[0] if guess_type else None
+            mimetype = mimetypes.guess_type(path)[0]
         else:
             mimetype = mime_type
         # We do not load the data immediately, instead we treat the blob as a
diff --git a/libs/core/langchain_core/utils/mustache.py b/libs/core/langchain_core/utils/mustache.py
index 54674c262fb..e8282b0f384 100644
--- a/libs/core/langchain_core/utils/mustache.py
+++ b/libs/core/langchain_core/utils/mustache.py
@@ -481,14 +481,6 @@ def render(
     Args:
         template: A file-like object or a string containing the template.
         data: A python dictionary with your data scope.
-        partials_path: The path to where your partials are stored.
-
-            If set to None, then partials won't be loaded from the file system
-
-            Defaults to `'.'`.
-        partials_ext: The extension that you want the parser to look for
-
-            Defaults to `'mustache'`.
         partials_dict: A python dictionary which will be search for partials
             before the filesystem is.