removing pytest-sugar pending Teemu/pytest-sugar#133

Author: mattsb42-aws

tox.ini

@@ -28,11 +28,9 @@ passenv =
 sitepackages = False
 deps =
     mock
-    pytest>3.3.0
+    pytest>=3.3.1
     pytest-cov
     pytest-mock
-    pytest-sugar
-    coverage
 commands =
     local: pytest --cov aws_encryption_sdk_cli -m local -l {posargs}
     integ: pytest --cov aws_encryption_sdk_cli -m integ -l {posargs}