remove duplicate CPython3.5 CI

Author: mattsb42-aws

.travis.yml

@@ -33,17 +33,6 @@ matrix:
     - python: 3.4
       env: TOXENV=py34-compatibility
     # CPython 3.5
-    - python: 3.5
-      env: TOXENV=py35-base
-    - python: 3.5
-      env: TOXENV=py35-cryptography-only
-    - python: 3.5
-      env: TOXENV=py35-pycryptodome-norsa
-    - python: 3.5
-      env: TOXENV=py35-pycrypto-norsa
-    - python: 3.5
-      env: TOXENV=py35-compatibility
-    # CPython 3.5
     - python: 3.5
       env: TOXENV=py35-base
     - python: 3.5