style: Remove untracked file name in comment

Author: seedspirit

src/ai/backend/manager/api/gql_legacy/stat_converter.py

@@ -23,8 +23,7 @@ class LegacyLiveStatConverter:
     `currents[0]` is the raw gauge sample, `currents[-1]` is the
     rate/diff query result.
 
-    `stats.max` / `stats.avg` are not populated — see
-    `docs/kernel-live-stat-followup-issues.md`.
+    `stats.max` / `stats.avg` are not populated
     """
 
     def convert(

tests/unit/manager/api/gql_legacy/test_stat_converter.py

@@ -137,8 +137,7 @@ def test_legacy_field_is_populated(
 class TestDiffMetric:
     """For a DIFF_STAT_METRICS entry the diff-over-window sample (currents[-1])
     is exposed as `current` (legacy Valkey behavior) and mirrored to
-    `stats.diff`. The cumulative gauge (currents[0]) is dropped — see
-    `docs/kernel-live-stat-followup-issues.md`.
+    `stats.diff`. The cumulative gauge (currents[0]) is dropped
     """
 
     @pytest.fixture