Revert ".travis.yml: Enable reports to coveralls."

This reverts commit f4c4617.

Author: jakirkham

.travis.yml

@@ -40,8 +40,8 @@ install:
 script:
    # Run tests.
    - python nosetests.py
-after_success:
+#after_success:
    # Submit results to coveralls.io.
-   - coveralls
+   #- coveralls
 # Use container format for TravisCI for quicker startup and builds.
 sudo: false