Update requirements.txt

Author: dciborow

test/requirements.txt

@@ -1,7 +1,7 @@
-attrs==19.3.0 # PyLint 
+attrs==19.3.0
 azureml-contrib-reinforcementlearning==1.21.0
 bandit==1.6.2
-black==19.10b0       # https://github.com/psf/black/issues/1847
+black==19.10b0
 check-manifest==0.45
 cryptography>=3.3,<3.4.0
 Cython
@@ -20,19 +20,19 @@ mock==4.0.2
 mypy==0.720
 numpy<1.19.0
 papermill==2.1.2
-pathlib2>=2.2.0        # pytest
-pbr==5.4.5             # bandit
+pathlib2>=2.2.0
+pbr==5.4.5
 pre-commit==2.8.2
 pylint>=2.7.0
 pylint_junit
 pytest-cov==2.7.1
 pytest-mock<=3.6.1
-pytest-runner          # flake8
+pytest-runner
 pytest==6.2.1
 scrapbook==0.5.0
-setuptools-scm         # virtualenv
+setuptools-scm
 setuptools==51.1.1
 shellcheck-py==0.7.1.1
 syncer==1.3.0
 testpath==0.4.4
-typing-extensions==3.7.4.2 # MyPi
+typing-extensions==3.7.4.2