Closes #2000: Remove support for Python 2

upgrade.sh

@@ -5,24 +5,8 @@
 # Once the script completes, remember to restart the WSGI service (e.g.
 # gunicorn or uWSGI).
 
-# Determine which version of Python/pip to use. Default to v3 (if available)
-# but allow the user to force v2.
 PYTHON="python3"
 PIP="pip3"
-type $PYTHON >/dev/null 2>&1 && type $PIP >/dev/null 2>&1 || PYTHON="python" PIP="pip"
-while getopts ":2" opt; do
-    case $opt in
-        2)
-            PYTHON="python"
-            PIP="pip"
-            echo "Forcing Python/pip v2"
-            ;;
-        \?)
-            echo "Invalid option: -$OPTARG" >&2
-            exit
-            ;;
-    esac
-done
 
 # Optionally use sudo if not already root, and always prompt for password
 # before running the command