i18n/ja: remove duplicate entry for 'しろう' (shirou) There are two entries for the same Japanese name 'しろう': # しろう, 2013 # shirou - しろう, 2013 The text 'しろう' translates to 'Shiro' according to Google Translate. This also corresponds to the 'shirou' text mentioned in the second entry. Assuming that these entries indeed correspond to the same person, remove the first.