Fixed broken links to chinese versions of some modules. The chinese version contains untranslated copies of english documentation for random_index and realip modules. The result is the appearance of 'translation to chinese' link for this modules pointing to non-existing document. This files are removed. Also, broken links are generated for the chinese version of the "flv" module, but the translation exists, although not enabled for publication. Since contents of file looks like a valid translation, it is allowed to be published.

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  Copyright (C) Igor Sysoev
  Copyright (C) Nginx, Inc.
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<!ELEMENT  i18n         (text+) >

<!ELEMENT  text         (item+) >
<!ATTLIST  text
           lang         CDATA #REQUIRED
>

<!ELEMENT  item         ANY>
<!ATTLIST  item
           id           CDATA #REQUIRED
>

<!ELEMENT  origin       (#PCDATA) >