removed python 3.9 test for now..

Author: brendancol

.travis.yml

@@ -10,8 +10,6 @@ matrix:
       env: PY=3.7
     - name: "python-3.8"
       env: PY=3.8
-    - name: "python-3.9"
-      env: PY=3.9
     - name: "tarball"
       env: PY=3