code_style: remove unused code

Signed-off-by: leo <longshuang@msn.cn>

Author: love-linger

src/Models/DiffResult.cs

@@ -1,4 +1,3 @@
-using System;
 using System.Collections.Generic;
 using System.Text;
 using System.Text.RegularExpressions;

src/ViewModels/ConfigureWorkspace.cs

@@ -54,13 +54,13 @@ public void MoveSelectedUp()
         {
             if (_selected == null)
                 return;
-            
+
             var idx = Workspaces.IndexOf(_selected);
             if (idx == 0)
                 return;
-            
+
             Workspaces.Move(idx - 1, idx);
-            
+
             Preferences.Instance.Workspaces.RemoveAt(idx);
             Preferences.Instance.Workspaces.Insert(idx - 1, _selected);
         }
@@ -69,13 +69,13 @@ public void MoveSelectedDown()
         {
             if (_selected == null)
                 return;
-            
+
             var idx = Workspaces.IndexOf(_selected);
             if (idx == Workspaces.Count - 1)
                 return;
-            
+
             Workspaces.Move(idx + 1, idx);
-            
+
             Preferences.Instance.Workspaces.RemoveAt(idx);
             Preferences.Instance.Workspaces.Insert(idx + 1, _selected);
         }

src/Views/CommitSubjectPresenter.cs

@@ -177,7 +177,7 @@ protected override void OnPropertyChanged(AvaloniaPropertyChangedEventArgs chang
                 var rules = IssueTrackerRules ?? [];
                 foreach (var rule in rules)
                     rule.Matches(_elements, subject);
-                
+
                 _elements.Sort((l, r) => l.Start - r.Start);
                 _needRebuildInlines = true;
                 InvalidateVisual();
@@ -319,7 +319,6 @@ private void GenerateFormattedTextElements()
                         foreground);
 
                 _inlines.Add(new Inline(x, normal, null));
-                x += normal.WidthIncludingTrailingWhitespace;
             }
         }