perf(RevisionDataGridView): Remove special OnScroll handler

Refs: #11719

GitUI/UserControls/RevisionGrid/RevisionDataGridView.cs

@@ -27,9 +27,6 @@ public sealed partial class RevisionDataGridView : DataGridView
 
  private readonly BackgroundUpdater _rowCountUpdater;
  private readonly BackgroundUpdater _visibleRowRangeUpdater;
- private readonly Stopwatch _lastRepaint = Stopwatch.StartNew();
- private readonly Stopwatch _lastScroll = Stopwatch.StartNew();
- private readonly Stopwatch _consecutiveScroll = Stopwatch.StartNew();
  private readonly List<ColumnProvider> _columnProviders = [];
  private readonly TaskManager _taskManager = ThreadHelper.CreateTaskManager();
  private readonly CancellationTokenSequence _updateVisibleRowRangeSequence = new();
@@ -113,11 +110,10 @@ public RevisionDataGridView()
  }
  };
 
- Scroll += (_, _) => OnScroll();
+ Scroll += (_, _) => UpdateVisibleRowRange();
  Resize += (_, _) => UpdateVisibleRowRange();
  GotFocus += (_, _) => InvalidateSelectedRows();
  LostFocus += (_, _) => InvalidateSelectedRows();
- RowPrePaint += (_, _) => _lastRepaint.Restart();
 
  CellPainting += OnCellPainting;
  CellFormatting += (_, e) =>
@@ -290,8 +286,6 @@ private Brush GetBackground(bool isSelected, bool isFocused, int rowIndex, GitRe
 
  private void OnCellPainting(object? sender, DataGridViewCellPaintingEventArgs e)
  {
- _lastRepaint.Restart();
-
  DebugHelpers.Assert(_rowHeight != 0, "_rowHeight != 0");
 
  if (e.RowIndex < 0 ||
@@ -661,31 +655,6 @@ private void SetRowCountAndSelectRowsIfReady()
  }
  }
 
- private void OnScroll()
- {
- UpdateVisibleRowRange();
-
- // When scrolling many rows within a short time, the message pump is
- // flooded with WM_CTLCOLORSCROLLBAR messages and the DataGridView
- // is not repainted. This happens for example when the mouse wheel
- // is spinning fast (with free-spinning mouse wheels) or while dragging
- // the scroll bar fast. In such cases, force a repaint to make the GUI
- // feel more responsive.
- if (_lastScroll.ElapsedMilliseconds > 100)
- {
- _consecutiveScroll.Restart();
- }
-
- if (_consecutiveScroll.ElapsedMilliseconds > 50
- && _lastRepaint.ElapsedMilliseconds > 50)
- {
- Update();
- _lastRepaint.Restart();
- }
-
- _lastScroll.Restart();
- }
-
  private void TriggerRowCountUpdate()
  {
  _rowCountUpdater.ScheduleExecution();