test: ARKODE is not a DAE solver

Author: AayushSabharwal

test/downstream/initialization.jl

@@ -3,32 +3,6 @@ using ModelingToolkit: t_nounits as t, D_nounits as D
 
 @testset "CheckInit" begin
     abstol = 1e-10
-    @testset "Sundials + ODEProblem" begin
-        function rhs(u, p, t)
-            return [u[1] * t, u[1]^2 - u[2]^2]
-        end
-        function rhs!(du, u, p, t)
-            du[1] = u[1] * t
-            du[2] = u[1]^2 - u[2]^2
-        end
-
-        oopfn = ODEFunction{false}(rhs, mass_matrix = [1 0; 0 0])
-        iipfn = ODEFunction{true}(rhs!, mass_matrix = [1 0; 0 0])
-
-        @testset "Inplace = $(SciMLBase.isinplace(f))" for f in [oopfn, iipfn]
-            prob = ODEProblem(f, [1.0, 1.0], (0.0, 1.0))
-            integ = init(prob, Sundials.ARKODE())
-            u0, _, success = SciMLBase.get_initial_values(
-                prob, integ, f, SciMLBase.CheckInit(), Val(SciMLBase.isinplace(f)); abstol)
-            @test success
-            @test u0 == prob.u0
-
-            integ.u[2] = 2.0
-            @test_throws SciMLBase.CheckInitFailureError SciMLBase.get_initial_values(
-                prob, integ, f, SciMLBase.CheckInit(), Val(SciMLBase.isinplace(f)); abstol)
-        end
-    end
-
     @testset "Sundials + DAEProblem" begin
         function daerhs(du, u, p, t)
             return [du[1] - u[1] * t - p, u[1]^2 - u[2]^2]