Revert "Test with latest PyPy in Travis"

.travis.yml

@@ -8,22 +8,8 @@ python:
   - '2.7.11'
   - '2.6'
   - '3.4'
-  - 'pypy'
 
 install:
-- |
-    if [ "$TRAVIS_PYTHON_VERSION" = "pypy" ]; then
-      export PYENV_ROOT="$HOME/.pyenv"
-      if [ -f "$PYENV_ROOT/bin/pyenv" ]; then
-        pushd "$PYENV_ROOT" && git pull && popd
-      else
-        rm -rf "$PYENV_ROOT" && git clone --depth 1 https://github.com/yyuu/pyenv.git "$PYENV_ROOT"
-      fi
-      export PYPY_VERSION="5.3"
-      "$PYENV_ROOT/bin/pyenv" install --skip-existing "pypy-$PYPY_VERSION"
-      virtualenv --python="$PYENV_ROOT/versions/pypy-$PYPY_VERSION/bin/python" "$HOME/virtualenvs/pypy-$PYPY_VERSION"
-      source "$HOME/virtualenvs/pypy-$PYPY_VERSION/bin/activate"
-    fi
 - pip install -r requirements.txt
 - pip install -r requirements-dev.txt