remove old initialize

Author: ChrisRackauckas

test/nonlinearsystem.jl

@@ -242,46 +242,3 @@ testdict = Dict([:test => 1])
     @test prob_.u0 == [1.0, 2.0, 1.0]
     @test prob_.p == MTKParameters(sys, [a => 2.0, b => 1.0, c => 1.0])
 end
-
-@testset "Initialization System" begin
-    # Define the Lotka Volterra system which begins at steady state
-    @parameters t
-    pars = @parameters a=1.5 b=1.0 c=3.0 d=1.0 dx_ss=1e-5
-
-    vars = @variables begin
-        dx(t),
-        dy(t),
-        (x(t) = dx ~ dx_ss), [guess = 0.5]
-        (y(t) = dy ~ 0), [guess = -0.5]
-    end
-
-    D = Differential(t)
-
-    eqs = [dx ~ a * x - b * x * y
-           dy ~ -c * y + d * x * y
-           D(x) ~ dx
-           D(y) ~ dy]
-
-    @named sys = ODESystem(eqs, t, vars, pars)
-
-    sys_simple = structural_simplify(sys)
-
-    # Set up the initialization system
-    sys_init = initializesystem(sys_simple)
-
-    sys_init_simple = structural_simplify(sys_init)
-
-    prob = NonlinearProblem(sys_init_simple,
-        get_default_or_guess.(unknowns(sys_init_simple)))
-
-    @test prob.u0 == [0.5, -0.5]
-
-    sol = solve(prob)
-    @test sol.retcode == SciMLBase.ReturnCode.Success
-
-    # Confirm for all the unknowns of the non-simplified system
-    @test all(.≈(sol[unknowns(sys)], [1e-5, 0, 1e-5 / 1.5, 0]; atol = 1e-8))
-
-    # Confirm for all the unknowns of the simplified system
-    @test all(.≈(sol[unknowns(sys_simple)], [1e-5 / 1.5, 0]; atol = 1e-8))
-end