Removed TimerCPU and TimerRT classes

src/TNL/CMakeLists.txt

src/TNL/Containers/Algorithms/cuda-reduction_impl.h

src/TNL/Matrices/MatrixReader_impl.h

src/TNL/Problems/HeatEquationProblem_impl.h

src/TNL/Solvers/ODE/ExplicitSolver.h

src/TNL/Solvers/ODE/ExplicitSolver_impl.h

src/TNL/Solvers/PDE/SemiImplicitTimeStepper.h

src/TNL/TimerCPU.cpp

src/TNL/TimerCPU.h

src/TNL/TimerRT.cpp

src/TNL/TimerRT.h

tests/benchmarks/benchmarks.h

tests/benchmarks/tnl-benchmark-spmv.h

tools/src/functions-benchmark.h