Clean up imports and formatting

app.py

 import os
-import socket
 from pathlib import Path
 
 import pdfplumber

search_index/basic_search_index.py

 import os
 import shutil
 
-from whoosh.index import create_in, open_dir, EmptyIndexError
 from whoosh.fields import TEXT, Schema, ID, NUMERIC
+from whoosh.index import create_in, open_dir, EmptyIndexError
 from whoosh.qparser import QueryParser, OrGroup
 
 

search_index/context_aware_search_index.py

+from deprecated import deprecated
+from nltk import word_tokenize
 from whoosh.qparser import QueryParser, OrGroup
 
-from nltk import word_tokenize
 from .basic_search_index import BasicSearchIndex
-from deprecated import deprecated
 
 
 @deprecated(reason="Uses overly complicated query creation. Use TitleFocusSearchIndex instead.")

search_index/title_focus_search_index.py

 from whoosh.qparser import QueryParser, OrGroup
+
 from .basic_search_index import BasicSearchIndex