message: Remove incorrect doc.
diff: @@ -706,8 +706,6 @@ void BilinearForm::EliminateBC(const Array<int> &ess_dofs,
  DiagonalPolicy diag_policy,
  SparseMatrix &A)
  {
  - // Eliminate essential DOFs (BCs) from the matrix (what we do here is
  - // equivalent to DiagonalPolicy::DIAG_ONE).
  const int n_ess_dofs = ess_dofs.Size();
  const auto ess_dofs_d = ess_dofs.Read();
  const auto I = A.ReadI();
  