Remove JSONL preview files

jsonl_preview/manifest.json

@@ -1,30 +0,0 @@
-{
-  "random_shuffle": {
-    "train": {
-      "rows": 20,
-      "file": "random_shuffle_train_first_20.jsonl"
-    },
-    "validation": {
-      "rows": 20,
-      "file": "random_shuffle_validation_first_20.jsonl"
-    },
-    "test": {
-      "rows": 20,
-      "file": "random_shuffle_test_first_20.jsonl"
-    }
-  },
-  "repo_split_balanced": {
-    "train": {
-      "rows": 20,
-      "file": "repo_split_balanced_train_first_20.jsonl"
-    },
-    "validation": {
-      "rows": 20,
-      "file": "repo_split_balanced_validation_first_20.jsonl"
-    },
-    "test": {
-      "rows": 20,
-      "file": "repo_split_balanced_test_first_20.jsonl"
-    }
-  }
-}