[ticket/12269] Delete folder mods in language

Deleted mods folder in phpbb/language/en/.

PHPBB3-12269
Merge branch 'ticket/12269' of github.com:netdeamon/phpbb into develop

# By netdeamon
# Via netdeamon
* 'ticket/12269' of github.com:netdeamon/phpbb:
  [ticket/12269] Delete folder mods in language