Qt: Remove "What's this" button

Source/Core/DolphinQt2/TAS/GCTASInputWindow.cpp

@@ -17,6 +17,8 @@
 GCTASInputWindow::GCTASInputWindow(QWidget* parent, int num) : QDialog(parent)
 {
   setWindowTitle(tr("GameCube TAS Input %1").arg(num + 1));
+  setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);
+
   auto* main_stick_box = CreateStickInputs(this, tr("Main Stick"), m_x_main_stick_value,
                                            m_y_main_stick_value, 255, 255, Qt::Key_F, Qt::Key_G);
   auto* c_stick_box = CreateStickInputs(this, tr("C Stick"), m_x_c_stick_value, m_y_c_stick_value,

Source/Core/DolphinQt2/TAS/WiiTASInputWindow.cpp

@@ -25,6 +25,8 @@
 
 WiiTASInputWindow::WiiTASInputWindow(QWidget* parent, int num) : QDialog(parent), m_num(num)
 {
+  setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);
+
   const QKeySequence ir_x_shortcut_key_sequence = QKeySequence(Qt::ALT + Qt::Key_F);
   const QKeySequence ir_y_shortcut_key_sequence = QKeySequence(Qt::ALT + Qt::Key_G);