remove apt-get install python-setuptools

.travis.yml

@@ -11,11 +11,8 @@ env:
 
 before_install:
   - sudo apt-get -qq update
-  - sudo apt-get install -y graphviz python-setuptools
-  - pip install -U pip
-  - pip install -U setuptools wheel
-  - pip -V
-  - python -c "import sys; print('\n'.join(sys.path))"
+  - sudo apt-get install -y graphviz
+  - pip install -U pip setuptools wheel
 
 install:
   - pip install -q -U -r requirements_tests.txt