remove dead code

Author: lokesh755

src/Runner.Worker/BackgroundStepCoordinator.cs

@@ -226,42 +226,6 @@ public async Task CancelStepsAsync(string[] cancelStepIds)
             }
         }
 
-        /// <summary>
-        /// Cancel ALL active background steps. Used as a safety net before post-hooks.
-        /// </summary>
-        public async Task CancelAllAsync()
-        {
-            var activeIds = _backgroundSteps.Values
-                .Where(bg => !bg.IsCompleted)
-                .Select(bg => bg.StepId)
-                .ToList();
-
-            if (activeIds.Count == 0) return;
-
-            _trace.Info($"Cancelling {activeIds.Count} active background step(s)...");
-            await CancelWithGracePeriodAsync(activeIds, graceSeconds: 7.5);
-
-            var stillRunning = activeIds
-                .Where(id => _backgroundSteps.TryGetValue(id, out var bg) && !bg.IsCompleted)
-                .ToList();
-            if (stillRunning.Count > 0)
-            {
-                _trace.Info($"{stillRunning.Count} background step(s) did not terminate gracefully.");
-                var finalTasks = stillRunning
-                    .Where(id => _backgroundSteps.ContainsKey(id))
-                    .Select(id => _backgroundSteps[id].ExecutionTask)
-                    .ToArray();
-                try
-                {
-                    await Task.WhenAll(finalTasks).WaitAsync(TimeSpan.FromSeconds(30));
-                }
-                catch (TimeoutException)
-                {
-                    _trace.Info("Background step(s) did not terminate within 30s. Proceeding with job cleanup.");
-                }
-            }
-        }
-
         // -----------------------------------------------------------------
         // Failure propagation
         // -----------------------------------------------------------------