DolphinQt: Remove redundant window hints

Remove window hints clearing the flag Qt::WindowContextHelpButtonHint,
which is already off by default in Qt 6.

In Qt 5 this flag was set by default for QDialogs, and on Windows put a
? button in the corner of the title bar allowing users to activate Qt's
QWhatsThis help system for a given widget. Since we don't set that text
the ? button was useless and so we hid it manually.

Source/Core/DolphinQt/Debugger/BranchWatchDialog.cpp

@@ -200,7 +200,7 @@ BranchWatchDialog::BranchWatchDialog(Core::System& system, Core::BranchWatch& br
     : QDialog(parent), m_system(system), m_branch_watch(branch_watch), m_code_widget(code_widget)
 {
   setWindowTitle(tr("Branch Watch Tool"));
-  setWindowFlags((windowFlags() | Qt::WindowMinMaxButtonsHint) & ~Qt::WindowContextHelpButtonHint);
+  setWindowFlags(windowFlags() | Qt::WindowMinMaxButtonsHint);
 
   // Branch Watch Table
   m_table_view = new QTableView(nullptr);