Drop Window::setClientShown()

It's unused.

src/window.cpp

@@ -802,11 +802,6 @@ bool Window::isTransient() const
     return false;
 }
 
-void Window::setClientShown(bool shown)
-{
-    Q_UNUSED(shown)
-}
-
 xcb_timestamp_t Window::userTime() const
 {
     return XCB_TIME_CURRENT_TIME;

src/window.h

@@ -1016,8 +1016,6 @@ public:
     }
     virtual void setFullScreen(bool set, bool user = true);
 
-    virtual void setClientShown(bool shown);
-
     QRect geometryRestore() const;
     virtual MaximizeMode maximizeMode() const;
     virtual MaximizeMode requestedMaximizeMode() const;

src/x11window.cpp

@@ -2188,28 +2188,6 @@ void X11Window::fetchIconicName()
     }
 }
 
-void X11Window::setClientShown(bool shown)
-{
-    if (isZombie()) {
-        return; // Don't change shown status if this client is being deleted
-    }
-    if (shown != hidden) {
-        return; // nothing to change
-    }
-    hidden = !shown;
-    if (shown) {
-        map();
-        takeFocus();
-        autoRaise();
-        FocusChain::self()->update(this, FocusChain::MakeFirst);
-    } else {
-        unmap();
-        // Don't move tabs to the end of the list when another tab get's activated
-        FocusChain::self()->update(this, FocusChain::MakeLast);
-        addWorkspaceRepaint(visibleGeometry());
-    }
-}
-
 void X11Window::getMotifHints()
 {
     const bool wasClosable = isCloseable();

src/x11window.h

@@ -258,14 +258,6 @@ public:
     StrutRect strutRect(StrutArea area) const override;
     bool hasStrut() const override;
 
-    /**
-     * If shown is true the client is mapped and raised, if false
-     * the client is unmapped and hidden, this function is called
-     * when the tabbing group of the client switches its visible
-     * client.
-     */
-    void setClientShown(bool shown) override;
-
     bool isClientSideDecorated() const;
 
     Xcb::Property fetchFirstInTabBox() const;