Redundant python3 call

[mike-usa]

If the code has successfully activated the environment, it should be able to use python and not rely on the system's python3, which should make the project more self-contained.

Applies to:

flask-sqlalchemy-tutorial/deploy.sh

Line 7 in e5bd958

python3 wsgi.py

flask-sqlalchemy-tutorial/deploy.sh

Line 11 in e5bd958

python3 -m pip install --upgrade pip

flask-sqlalchemy-tutorial/deploy.sh

Line 13 in e5bd958

python3 wsgi.py