Remove stale task2_signal_detection (replaced by task2_exploit_type)

benchmark_v2/task2_signal_detection/corpus.jsonl

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:875266e9e23a9e7862fe31c0d96ef1ed27828390ab34fa31a4f679feca5d60f8
-size 123194610

benchmark_v2/task2_signal_detection/meta.json

@@ -1,40 +0,0 @@
-{
-  "task": "hacker_signal_detection",
-  "description": "Two-stage: detect actionable exploit signals from hacker community noise, then ground positives to NVD CVE.",
-  "label_map": {
-    "0": "not_actionable",
-    "1": "actionable_exploit_signal"
-  },
-  "metrics": [
-    "f1_actionable",
-    "precision",
-    "recall",
-    "joint_recall@5",
-    "mrr"
-  ],
-  "split_boundaries": {
-    "train_end": "2022-01-01",
-    "val_end": "2024-01-01"
-  },
-  "negative_ratio": "10:1",
-  "corpus_size": 340536,
-  "splits": {
-    "train": 4202,
-    "val": 1606,
-    "test": 407
-  },
-  "label_distribution": {
-    "train": {
-      "pos": 382,
-      "neg": 3820
-    },
-    "val": {
-      "pos": 146,
-      "neg": 1460
-    },
-    "test": {
-      "pos": 37,
-      "neg": 370
-    }
-  }
-}

benchmark_v2/task2_signal_detection/train.jsonl

@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:b5ea91eecad63d4ca2f870403394f9f469bedcc2e18ee46ae5bc5c4427ba9879
-size 6889544