unicode_normalize/normalize.rb: remove unnecessary module names

* lib/unicode_normalize/normalize.rb (UnicodeNormalize): use self
  instead of module name and remove module name if unnecessary.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48044 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
unicode_normalize/normalize.rb: simplify

* lib/unicode_normalize/normalize.rb (NF_HASH_{D,C,K}): remove
  first element by Hash#shift.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48045 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
unicode_normalize/normalize.rb: remove prefix

* lib/unicode_normalize/normalize.rb (hangul_decomp_one): remove
  system hungarian prefix, nonsense in ruby.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48046 b2dd03c8-39d4-4d8f-98ff-823fe69b080e