[tests] Remove failing test_ASCII_compatible test
[tests] Remove failing test_ASCII_compatible test

- remove failing page_tests.TestPageRepr.test_ASCII_compatible
  because Python 2 has been dropped and this issue will not be
  solved. No need to test this known bug anymore

Bug: T130919
Bug: T66958
Change-Id: I94e168d07b3e1fb05e2d2a09d6a72949ffe22939

wikimedia/pywikibot-core,wikimedia/pywikibot-core