Remove deprecated QInputMethod::visible()

Replaced with isVisible()

Change-Id: Id47683954e89c53e73fc5171977609de7f1b4245
Reviewed-by: Qt Doc Bot <qt_docbot@qt-project.org>
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>

src/gui/kernel/qinputmethod.cpp

@@ -168,13 +168,6 @@ void QInputMethod::hide()
         ic->hideInputPanel();
 }
 
-/*!
-    \fn bool QInputMethod::visible() const
-    \obsolete
-
-    Use isVisible() instead.
-*/
-
 /*!
     \property QInputMethod::visible
     \brief Virtual keyboard's visibility on the screen

src/gui/kernel/qinputmethod.h

@@ -82,10 +82,6 @@ public:
         ContextMenu
     };
 
-#if QT_DEPRECATED_SINCE(5,0)
-    QT_DEPRECATED bool visible() const { return isVisible(); }
-#endif
-
     bool isVisible() const;
     void setVisible(bool visible);