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/Config/CheatCodeEditor.cpp

@@ -23,7 +23,6 @@
 
 CheatCodeEditor::CheatCodeEditor(QWidget* parent) : QDialog(parent)
 {
-  setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);
   setWindowTitle(tr("Cheat Code Editor"));
 
   CreateWidgets();

Source/Core/DolphinQt/Config/ControllerInterface/ControllerInterfaceWindow.cpp

@@ -17,7 +17,6 @@ ControllerInterfaceWindow::ControllerInterfaceWindow(QWidget* parent) : QDialog(
   CreateMainLayout();
 
   setWindowTitle(tr("Alternate Input Sources"));
-  setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);
 }
 
 void ControllerInterfaceWindow::CreateMainLayout()

Source/Core/DolphinQt/Config/ControllerInterface/DualShockUDPClientAddServerDialog.cpp

@@ -29,7 +29,6 @@ DualShockUDPClientAddServerDialog::DualShockUDPClientAddServerDialog(QWidget* pa
 void DualShockUDPClientAddServerDialog::CreateWidgets()
 {
   setWindowTitle(tr("Add New DSU Server"));
-  setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);
 
   m_main_layout = new QGridLayout;
 

Source/Core/DolphinQt/Config/FreeLookWindow.cpp

@@ -17,7 +17,6 @@ FreeLookWindow::FreeLookWindow(QWidget* parent) : QDialog(parent)
   ConnectWidgets();
 
   setWindowTitle(tr("Free Look Settings"));
-  setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);
 }
 
 void FreeLookWindow::CreateMainLayout()

Source/Core/DolphinQt/Config/Graphics/ColorCorrectionConfigWindow.cpp

@@ -22,7 +22,6 @@
 ColorCorrectionConfigWindow::ColorCorrectionConfigWindow(QWidget* parent) : QDialog(parent)
 {
   setWindowTitle(tr("Color Correction Configuration"));
-  setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);
 
   Create();
   ConnectWidgets();

Source/Core/DolphinQt/Config/Graphics/GraphicsWindow.cpp

@@ -28,7 +28,6 @@ GraphicsWindow::GraphicsWindow(MainWindow* parent) : QDialog(parent), m_main_win
   CreateMainLayout();
 
   setWindowTitle(tr("Graphics"));
-  setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);
 
   OnBackendChanged(QString::fromStdString(Config::Get(Config::MAIN_GFX_BACKEND)));
 

Source/Core/DolphinQt/Config/Graphics/PostProcessingConfigWindow.cpp

@@ -42,7 +42,6 @@ PostProcessingConfigWindow::PostProcessingConfigWindow(EnhancementsWidget* paren
   }
 
   setWindowTitle(tr("Post-Processing Shader Configuration"));
-  setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);
 
   PopulateGroups();
   Create();

Source/Core/DolphinQt/Config/Mapping/GCPadWiiUConfigDialog.cpp

@@ -17,8 +17,6 @@
 GCPadWiiUConfigDialog::GCPadWiiUConfigDialog(int port, QWidget* parent)
     : QDialog(parent), m_port{port}
 {
-  setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);
-
   CreateLayout();
 
   LoadSettings();

Source/Core/DolphinQt/Config/Mapping/IOWindow.cpp

@@ -268,7 +268,6 @@ IOWindow::IOWindow(MappingWindow* window, ControllerEmu::EmulatedController* con
   connect(&Settings::Instance(), &Settings::ConfigChanged, this, &IOWindow::ConfigChanged);
 
   setWindowTitle(type == IOWindow::Type::Input ? tr("Configure Input") : tr("Configure Output"));
-  setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);
 
   ConfigChanged();
 

Source/Core/DolphinQt/Config/Mapping/MappingWindow.cpp

@@ -65,7 +65,6 @@ MappingWindow::MappingWindow(QWidget* parent, Type type, int port_num)
     : QDialog(parent), m_port(port_num)
 {
   setWindowTitle(tr("Port %1").arg(port_num + 1));
-  setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);
 
   CreateDevicesLayout();
   CreateProfilesLayout();

Source/Core/DolphinQt/Config/NewPatchDialog.cpp

@@ -38,7 +38,6 @@ NewPatchDialog::NewPatchDialog(QWidget* parent, PatchEngine::Patch& patch)
     : QDialog(parent), m_patch(patch)
 {
   setWindowTitle(tr("Patch Editor"));
-  setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);
 
   CreateWidgets();
   ConnectWidgets();

Source/Core/DolphinQt/Config/SettingsWindow.cpp

@@ -24,8 +24,6 @@
 
 StackedSettingsWindow::StackedSettingsWindow(QWidget* parent) : QDialog{parent}
 {
-  setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);
-
   // This eliminates the ugly line between the title bar and window contents with KDE Plasma.
   setStyleSheet(QStringLiteral("QDialog { border: none; }"));