TESTS.md: Remove Python 2.7 references from TESTS.md (#1822)
TESTS.md: Remove Python 2.7 references from TESTS.md (#1822)


behrtam/xpython,jmluy/xpython,exercism/xpython,jmluy/xpython,exercism/xpython,exercism/python,exercism/python,behrtam/xpython