Remove pyYAML dependency. (#585)

Author: nadiaya

CHANGELOG.rst

@@ -13,6 +13,7 @@ CHANGELOG
 * doc-fix: Specify that Local Mode supports only framework and BYO cases
 * doc-fix: Add missing classes to API docs
 * doc-fix: Add information on necessary AWS permissions
+* bug-fix: Remove PyYAML to let docker-compose install the right version
 
 1.16.3
 ======

setup.py

@@ -34,8 +34,8 @@ def read(fname):
 
 # Declare minimal set for installation
 required_packages = ['boto3>=1.9.64', 'numpy>=1.9.0', 'protobuf>=3.1', 'scipy>=0.19.0',
-                     'urllib3>=1.21', 'PyYAML>=3.2, <4', 'protobuf3-to-dict>=0.1.5',
-                     'docker-compose>=1.23.0', 'requests>=2.20.0, <2.21']
+                     'urllib3>=1.21', 'protobuf3-to-dict>=0.1.5', 'docker-compose>=1.23.0',
+                     'requests>=2.20.0, <2.21']
 
 # enum is introduced in Python 3.4. Installing enum back port
 if sys.version_info < (3, 4):