Remove the dead regexes.no_vowels config (#268)

Nothing in nameparser/, tests/, or docs/ referenced it -- it was dead in
v1 and the 2.0 pipeline never looked at it either. Reading
CONSTANTS.regexes.no_vowels now raises AttributeError like any other
unknown key (#256).

No dedicated test: asserting a key's absence from a config constant is
the constant-content testing we avoid. The full suite passing with no
residual references is the evidence.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: derek73

nameparser/config/regexes.py

@@ -26,7 +26,6 @@
     "double_quotes": re.compile(r'\"(.*?)\"'),
     "parenthesis": re.compile(r'\((.*?)\)'),
     "roman_numeral": re.compile(r'^(X|IX|IV|V?I{0,3})$', re.I),
-    "no_vowels": re.compile(r'^[^aeyiuo]+$', re.I),
     "period_not_at_end": re.compile(r'.*\..+$', re.I),
     "emoji": re_emoji,
     "bidi": re_bidi,