Update requirements.txt

requirements.txt

@@ -1,9 +1,4 @@
-# This file may be used to create an environment using:
-# $ conda create --name <env> --file <this file>
-
-pandas==1.3.2
-dask==2022.2.1
-numpy==1.20.3
-scipy==1.7.1
-requests==2.31.0
-biopython==1.81
+pandas
+numpy
+requests
+biopython