Removed method sum from all vector types

src/Benchmarks/ODESolvers/Euler.hpp

src/Benchmarks/ODESolvers/Merson.hpp

src/TNL/Containers/Algorithms/VectorOperations.h

src/TNL/Containers/Algorithms/VectorOperationsCuda_impl.h

src/TNL/Containers/Algorithms/VectorOperationsHost_impl.h

src/TNL/Containers/DistributedVector.h

src/TNL/Containers/DistributedVector.hpp

src/TNL/Containers/DistributedVectorView.h

src/TNL/Containers/DistributedVectorView.hpp

src/TNL/Containers/Vector.h

src/TNL/Containers/Vector.hpp

src/TNL/Containers/VectorView.h

src/TNL/Containers/VectorView.hpp

src/TNL/Meshes/MeshDetails/MeshLayers/BoundaryTags/Layer.h