Remove no longer used requirements.txt

requirements.txt

-biopython==1.79
-deepspeed==0.5.3
-dm-tree==0.1.6
-ml-collections==0.1.0
-numpy==1.21.2
-PyYAML==5.4.1
-requests==2.26.0
-scipy==1.7.1
-torch==1.10.0
-tqdm==4.62.2
-typing-extensions==3.10.0.2
-pytorch_lightning==1.5.0
-git+git://github.com/NVIDIA/dllogger.git