Go to pythonanwyere.com and then login
https://www.pythonanywhere.com/

Go to Consoles > Bash
cd ~
rm -f web2py_src.zip
wget -c http://web2py.com/examples/static/web2py_src.zip
rm -rf web2py/applications
rm -rf web2py/deposit
rm -rf web2py/examples
rm -rf web2py/extras
rm -rf web2py/gluon
rm -rf web2py/handlers
rm -rf web2py/logs
rm -rf web2py/scripts
rm -rf web2py/site-packages
unzip web2py_src.zip
replace web2py/web2py.py? [y]es, [n]o, [A]ll, [N]one, [r]ename: A

Remove Examples and Welcome apps
rm -rf web2py/applications/examples
rm -rf web2py/applications/welcome
rm -f web2py_src.zip