oox: remove redundant virtuals, implied by override

Change-Id: Ia72aa17e82ccdf78b0581228b84ffafc1f6be4ba
Reviewed-on: https://gerrit.libreoffice.org/35824Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>
Tested-by: Jenkins <ci@libreoffice.org>

oox/source/shape/LockedCanvasContext.hxx

@@ -23,9 +23,9 @@ class LockedCanvasContext : public oox::core::ContextHandler2
 {
 public:
     explicit LockedCanvasContext(oox::core::ContextHandler2Helper& rParent);
-    virtual ~LockedCanvasContext() override;
+    ~LockedCanvasContext() override;
 
-    virtual ::oox::core::ContextHandlerRef onCreateContext(sal_Int32 Element, const ::oox::AttributeList& rAttribs) override;
+    oox::core::ContextHandlerRef onCreateContext(sal_Int32 Element, const ::oox::AttributeList& rAttribs) override;
 
     const oox::drawingml::ShapePtr& getShape()
     {

oox/source/shape/WpgContext.hxx

@@ -23,9 +23,9 @@ class WpgContext : public oox::core::ContextHandler2
 {
 public:
     explicit WpgContext(oox::core::ContextHandler2Helper& rParent);
-    virtual ~WpgContext() override;
+    ~WpgContext() override;
 
-    virtual oox::core::ContextHandlerRef onCreateContext(sal_Int32 nElementToken, const oox::AttributeList& rAttribs) override;
+    oox::core::ContextHandlerRef onCreateContext(sal_Int32 nElementToken, const oox::AttributeList& rAttribs) override;
 
     const oox::drawingml::ShapePtr& getShape()
     {

oox/source/shape/WpsContext.hxx

@@ -23,9 +23,9 @@ class WpsContext : public oox::core::ContextHandler2
 {
 public:
     WpsContext(oox::core::ContextHandler2Helper& rParent, css::uno::Reference<css::drawing::XShape> xShape);
-    virtual ~WpsContext() override;
+    ~WpsContext() override;
 
-    virtual oox::core::ContextHandlerRef onCreateContext(sal_Int32 nElementToken, const oox::AttributeList& rAttribs) override;
+    oox::core::ContextHandlerRef onCreateContext(sal_Int32 nElementToken, const oox::AttributeList& rAttribs) override;
 
     const oox::drawingml::ShapePtr& getShape()
     {