chore(common): Handcrafted langtags.json due to bugs in official ve…

…rsion

The `langtags.json` version downloadable from
https://github.com/silnrsi/langtags/ has several duplicated tags due to
silnrsi/langtags#15.

This change removes the duplicates from `langtags.json`, and also removes
the `tpo-Zzzz-LA` tag according to the newer `langtags.json` in the
https://github.com/silnrsi/langtags repo. See also
silnrsi/langtags#16.

resources/standards-data/langtags/langtags.json

@@ -1842,7 +1842,7 @@
         "script": "Arab",
         "sldr": true,
         "tag": "aeb",
-        "tags": [ "aeb-Arab", "aeb-TN", "ajt", "ajt-Arab", "ajt-Arab-TN", "ajt-TN", "ar-aeb", "ar-aeb-Arab", "ar-aeb-Arab-TN", "ar-aeb-TN", "aeb-Arab-IL", "ar-aeb-Arab-IL", "ar-aeb-Arab-TN" ],
+        "tags": [ "aeb-Arab", "aeb-TN", "ajt", "ajt-Arab", "ajt-Arab-TN", "ajt-TN", "ar-aeb", "ar-aeb-Arab", "ar-aeb-Arab-TN", "ar-aeb-TN", "aeb-Arab-IL", "ar-aeb-Arab-IL" ],
         "windows": "aeb-Arab"
     },
     {
@@ -117995,21 +117995,6 @@
         "tags": [ "tpw", "tpw-Latn", "tpw-Latn-XX", "tpw-XX" ],
         "windows": "tpn-Latn-XX"
     },
-    {
-        "full": "tpo-Zzzz-LA",
-        "iana": [ "Tai Pao" ],
-        "iso639_3": "tpo",
-        "name": "Tai Pao",
-        "names": [ "Hàng Tong", "Tai Hang Tong", "Tai Paw", "Thai Muong", "Tày Muòng" ],
-        "region": "LA",
-        "regionname": "Lao People's Democratic Republic",
-        "regions": [ "VN" ],
-        "script": "Zzzz",
-        "sldr": false,
-        "tag": "tpo-Zzzz-LA",
-        "tags": [ "thc-Zzzz-LA", "thc-Zzzz-LA-x-laipao", "thc-Zzzz-x-laipao" ],
-        "windows": "tpo-Zzzz-LA"
-    },
     {
         "full": "tpo-Zzzz-LA-x-laipao",
         "iana": [ "Tai Pao" ],