Update requirements.txt

requirements.txt

@@ -9,10 +9,7 @@ langchain-community==0.3.27
 langchain-huggingface==0.3.1
 sentence-transformers==4.1.0
 docx2txt==0.9
-pypdf==5.7.0
 langchain-google-genai==2.1.8
-chromadb==1.0.15
-langchain-chroma==0.2.5
 langchain-core==0.3.72
 rank-bm25==0.2.2
 faiss-cpu==1.7.4
@@ -23,7 +20,6 @@ cachetools==5.3.3
 langchain-text-splitters==0.3.9
 torch==2.3.0
 nltk==3.9.1
-flashrank==0.2.10
 python-pptx==0.6.23
 openpyxl==3.1.2
 pillow==10.3.0