Update requirements.txt (#208)

remove pyyaml and tqdm

Author: oindrilasaha

examples/pytorch/vision/Face_Detection/requirements.txt

@@ -3,8 +3,6 @@ easydict==1.9
 importlib-metadata==1.5.0
 matplotlib==3.2.1
 opencv-python-headless==4.2.0.32
-PyYAML==3.12
 scikit-image==0.15.0
 tensorboard==1.14.0
 tensorboardX==1.9
-tqdm==4.36.1