Removed duplicate entries from the locales list

tutorials/i18n/locales.rst

@@ -246,8 +246,6 @@ List of supported language codes
 +---------------+-------------------------------+
 | cs            | Czech                         |
 +---------------+-------------------------------+
-| csb           | Kashubian                     |
-+---------------+-------------------------------+
 | cu            | Church Slavic                 |
 +---------------+-------------------------------+
 | cv            | Chuvash                       |
@@ -620,8 +618,6 @@ List of supported language codes
 +---------------+-------------------------------+
 | lad           | Ladino                        |
 +---------------+-------------------------------+
-| lag           | Langi                         |
-+---------------+-------------------------------+
 | lah           | Lahnda                        |
 +---------------+-------------------------------+
 | lam           | Lamba                         |
@@ -780,8 +776,6 @@ List of supported language codes
 +---------------+-------------------------------+
 | naq           | Nama                          |
 +---------------+-------------------------------+
-| nan           | Min Nan Chinese               |
-+---------------+-------------------------------+
 | nb, no        | Norwegian Bokmål              |
 +---------------+-------------------------------+
 | nd            | North Ndebele                 |