Removing tensorflow from setup.py

Author: jccaicedo

.travis.yml

@@ -3,6 +3,7 @@ language: python
 python:
   - "3.6"
 install: 
+  - pip install tensorflow
   - pip install .[test]
 script:
   - py.test

setup.py

@@ -29,7 +29,7 @@
         "scikit-image>=0.14.0",
         "scikit-learn>=0.19.0",
         "scipy>=1.1",
-        "tensorflow==1.12.2"
+#        "tensorflow-gpu==1.12.2"
     ],
     extras_require={
         "test": [