[cleanup] cleanup scripts/protect.py
[cleanup] cleanup scripts/protect.py

- remove preleading "u" from strings
- use str.format(...) instead of modulo for type specifier
  arguments

Change-Id: I78b87e2e7e2774a754fd0f88e2f6f2f8d3a822d0

PersianWikipedia/pywikibot-core,wikimedia/pywikibot-core,wikimedia/pywikibot-core