Fix import errors

Author: HackyRoot

src/document_to_podcast/preprocessing/__init__.py

@@ -1,4 +1,4 @@
-from .data_loaders import load_pdf, load_txt, load_docx, load_url, load_file
+from .data_loaders import load_txt, load_url, load_file
 from .data_cleaners import (
     clean_with_regex,
     clean_html,

tests/integration/test_data_load_and_clean.py

@@ -3,6 +3,7 @@
     markdown_to_text,
 )
 from document_to_podcast.preprocessing.data_loaders import load_txt, load_file
+from unittest.mock import Mock
 
 
 def test_load_and_clean_pdf(example_data):
@@ -11,7 +12,7 @@ def test_load_and_clean_pdf(example_data):
     # Create mock file using Mock
     mock_file = Mock()
     mock_file.name = file_path.name
-    mock_file.getvalue.return_value = open(file_path, 'rb').read()
+    mock_file.getvalue.return_value = open(file_path, "rb").read()
 
     result = load_file(mock_file)
 
@@ -25,7 +26,7 @@ def test_load_and_clean_html(example_data):
     # Create mock file using Mock
     mock_file = Mock()
     mock_file.name = file_path.name
-    mock_file.getvalue.return_value = open(file_path, 'rb').read()
+    mock_file.getvalue.return_value = open(file_path, "rb").read()
 
     result = load_file(mock_file)