lint: remove qt SIGNAL/SLOT lint

I think we are past the point where we need to lint for this, the CPU
can probably be better utilized.

src/qt/bitcoingui.h

@@ -303,7 +303,7 @@ public Q_SLOTS:
     /** Show window if hidden, unminimize when minimized, rise when obscured or show if hidden and fToggleHidden is true */
     void showNormalIfMinimized() { showNormalIfMinimized(false); }
     void showNormalIfMinimized(bool fToggleHidden);
-    /** Simply calls showNormalIfMinimized(true) for use in SLOT() macro */
+    /** Simply calls showNormalIfMinimized(true) */
     void toggleHidden();
 
     /** called by a timer to check if ShutdownRequested() has been set **/