Ast 1143 remove constraints
This removes two unused constraints. PhaseOnlyConstraint is replaced by SolverBase->SetPhaseOnly. DiagonalConstraint was not used at all anymore. AmplitudeOnlyConstraint still seems to be used.
This removes two unused constraints. PhaseOnlyConstraint is replaced by SolverBase->SetPhaseOnly. DiagonalConstraint was not used at all anymore. AmplitudeOnlyConstraint still seems to be used.