README: remove cz_cs config (deleted files, keeping cs_cz as correct)

README.md

@@ -210,12 +210,6 @@ configs:
     path: data/cs_cz/*train-*.parquet
   - split: test
     path: data/cs_cz/*test-*.parquet
-- config_name: cz_cs
-  data_files:
-  - split: train
-    path: data/cz_cs/*train-*.parquet
-  - split: test
-    path: data/cz_cs/*test-*.parquet
 - config_name: de_at
   data_files:
   - split: train
@@ -843,7 +837,6 @@ for row in ds:
 | `nl_nl` | Netherlands | Dutch | 3,692.6 | 3.00 |
 | `pl_pl` | Poland | Polish | 2,731.9 | 2.70 |
 | `cs_cz` | Czech Republic | Czech | 2,689.5 | 2.87 |
-| `cz_cs` | Czechia | Czech | 2,230.4 | 2.77 |
 | `es_es` | Spain | Spanish | 2,097.4 | 2.52 |
 | `yue_hk` | Hong Kong | Cantonese | 1,943.5 | 3.02 |
 | `lb_lu` | Luxembourg | Luxembourgish | 1,805.3 | 2.87 |