Fix conflicts with pyyaml and requests versions

Author: epou

requirements/common.pip

@@ -83,10 +83,8 @@ python-dateutil==2.8.1
 python-geohash==0.8.5
 python-slugify==4.0.1
 python3-memcached==1.51
-PyYAML==5.1.2
 redgreenunittest==0.1.1
 redis==2.10.3
-requests==2.18.1
 rsa==4.7.2
 scandir==1.5
 scikit-learn==0.21.3

requirements/prod_20_04.pip

@@ -93,11 +93,9 @@ python-geohash==0.8.5
 python-magic==0.4.27
 python-slugify==4.0.1
 python3-memcached==1.51
-PyYAML==5.1.2
 rawpy==0.17.1
 redgreenunittest==0.1.1
 redis==2.10.3
-requests==2.18.1
 rsa==4.7.2
 scandir==1.5
 scikit-learn==0.21.3