Fix requirements.txt formatting - remove pip install prefix

requirements.txt

@@ -1,11 +1,9 @@
-torch>=2.1.0
-transformers>=4.35.0
+streamlit==1.28.0
+torch==2.0.1
+transformers==4.34.0
+scikit-learn
 pandas
 numpy
-scikit-learn
-nltk>=3.7
-PyPDF2>=3.0.1
-streamlit>=1.22.0
-safetensors>=0.4.0
-pip install boto3
-pip freeze > requirements.txt
+nltk
+pdfplumber
+boto3