Minor clean-ups.

app.py

@@ -341,7 +341,6 @@ try:
          'version'
       ])
    for option, optarg in options:
-      print(option)
       if option in ( '-d', '--device' ):
          runOnDevice = optarg
       elif option in ( '-v', '--version' ):

check-with-mypy

@@ -4,7 +4,5 @@ SCRIPTS="app.py"
 
 for script in $SCRIPTS ; do
    echo "$script:"
-   # NOTE: --ignore-missing-imports is necessary, since netifaces
-   #       does not provide typing hints!
    mypy --strict --ignore-missing-imports $script
 done