Revert "ok, all levels of pyenv are now set…"

This reverts commit af527ab.

Author: theengineear

circle/setup.sh

@@ -20,7 +20,6 @@ for version in ${PLOTLY_PYTHON_VERSIONS[@]}; do
     pyenv global ${version}
     pyenv local ${version}
     pyenv shell ${version}
-    export PYENV_VERSION=${version}
     echo "Using pyenv version $(pyenv version)"
 
     # install core requirements all versions need

circle/test.sh

@@ -20,7 +20,6 @@ for version in ${PLOTLY_PYTHON_VERSIONS[@]}; do
     pyenv global ${version}
     pyenv local ${version}
     pyenv shell ${version}
-    export PYENV_VERSION=${version}
     echo "Using pyenv version $(pyenv version)"
 
     echo "python -c 'import sys; print(sys.version_info)' yields:"