Fix tokenizer export artifact: remove fixed padding/truncation from tokenizer.json

tokenizer.json

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:ac57986969a960624e9aada9d2597511451d3a0c7bccad04fc9ba9de44323be2
-size 14615111
+oid sha256:80c847d11c23aa906d5858cf4f5b1ed27b8a7d62fff8f7712256861e5640d27e
+size 14614842