Update GPUChainITS.h

Author: f3sch

GPU/GPUTracking/Global/GPUChainITS.h

@@ -34,7 +34,7 @@ class GPUChainITS final : public GPUChain
   friend class GPUReconstruction;
 
  public:
-  ~GPUChainITS() override;
+  ~GPUChainITS() = default;
   int32_t Init() override;
   int32_t PrepareEvent() override;
   int32_t Finalize() override;