consumer_base: Remove redundant virtual

override already serves this purpose

src/core/hle/service/nvflinger/consumer_base.h

@@ -27,12 +27,12 @@ public:
 
 protected:
     explicit ConsumerBase(std::unique_ptr<BufferQueueConsumer> consumer_);
-    virtual ~ConsumerBase();
+    ~ConsumerBase() override;
 
-    virtual void OnFrameAvailable(const BufferItem& item) override;
-    virtual void OnFrameReplaced(const BufferItem& item) override;
-    virtual void OnBuffersReleased() override;
-    virtual void OnSidebandStreamChanged() override;
+    void OnFrameAvailable(const BufferItem& item) override;
+    void OnFrameReplaced(const BufferItem& item) override;
+    void OnBuffersReleased() override;
+    void OnSidebandStreamChanged() override;
 
     void FreeBufferLocked(s32 slot_index);
     Status AcquireBufferLocked(BufferItem* item, std::chrono::nanoseconds present_when);