feat: Add crash recovery on Windows (#5012)

src/widgets/dialogs/LastRunCrashDialog.hpp

@@ -1,6 +1,5 @@
 #pragma once
 
-#include <pajlada/signals/signalholder.hpp>
 #include <QDialog>
 
 namespace chatterino {
@@ -9,9 +8,6 @@ class LastRunCrashDialog : public QDialog
 {
 public:
     LastRunCrashDialog();
-
-private:
-    pajlada::Signals::SignalHolder signalHolder_;
 };
 
 }  // namespace chatterino