Removed useless uses of NoDistrCommunicator

src/Benchmarks/DistSpMV/tnl-benchmark-distributed-spmv.h

src/Benchmarks/LinearSolvers/tnl-benchmark-linear-solvers.h

src/Benchmarks/ODESolvers/Euler.hpp

src/Benchmarks/ODESolvers/Merson.hpp

src/Benchmarks/ODESolvers/SimpleProblem.h

src/Benchmarks/ODESolvers/tnl-benchmark-ode-solvers.h

src/TNL/Solvers/Linear/Traits.h

src/TNL/Solvers/ODE/Merson_impl.h

src/TNL/Solvers/SolverInitiator.h

src/TNL/Solvers/SolverInitiator_impl.h

src/TNL/Solvers/SolverStarter_impl.h

src/Tools/tnl-init.h