Remove non-standard texts

korpus.parquet

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:f2e89c6c8f3b78294b8ce1e533726348798aad2def8fcfefb44df990811d79a3
-size 934968253
+oid sha256:69711f56c465d1907b60b77274ac627fc9cf677e0a4f00ba4d75c32261d27c12
+size 929203689