Delete added_tokens.json as config.json already have pad token (#19)

- Delete added_tokens.json as config.json already have pad token (33e73eaadcf363fbb25c48d08b8226f6b6fcbb2f)


Co-authored-by: Jiqing.Feng <[email protected]>

added_tokens.json

@@ -1,3 +0,0 @@
-{
-  "<pad>": 100352
-}