Revert "fix: dde-file-manager crash"

This reverts commit 9f162cb.

src/dfm-base/utils/clipboard.cpp

@@ -11,7 +11,6 @@
 #include <dfm-base/file/local/localfileiconprovider.h>
 #include <dfm-base/mimetype/mimetypedisplaymanager.h>
 #include <dfm-base/utils/fileutils.h>
-#include <dfm-base/widgets/filemanagerwindowsmanager.h>
 
 #include <QApplication>
 #include <QClipboard>
@@ -41,8 +40,7 @@ static constexpr char kRemoteAssistanceCopyKey[] = "uos/remote-copied-files";
 
 void onClipboardDataChanged()
 {
-    if (FileManagerWindowsManager::instance().windowIdList().count() <= 0)
-        return;
+
     QMutexLocker lk(&clipboardFileUrlsMutex);
     clipboardFileUrls.clear();
 
@@ -94,11 +92,6 @@ ClipBoard::ClipBoard(QObject *parent)
         onClipboardDataChanged();
         emit clipboardDataChanged();
     });
-
-    connect(qApp, &QApplication::aboutToQuit, this, [this]{
-        disconnect();
-        qCWarning(logDFMBase) << "disconnect clip board singal!";
-    });
 }
 
 ClipBoard *ClipBoard::instance()