remove specific install for cwltool

README.md

@@ -80,10 +80,9 @@ So we need to pull `Toil` repository and modify the `setup.py` prior to manual i
 
 ### Install cwltool and cwl-utils
 
-Since we want specific versions of `cwltool` and `cwl-utils` for the moment, we refer to github repository directly:
+Since we want specific version `cwl-utils` for the moment, we refer to github repository directly:
 
 ```bash
-(your-toil-venv)$ pip install --upgrade cwltool==1.0.20190603140227
 (your-toil-venv)$ pip install -e git+https://github.com/khillion/cwl-utils.git#egg=cwl_utils  # This need to change to to be more stable
 ```