simplify jac_config

Author: oscardssmith

lib/OrdinaryDiffEqDifferentiation/src/derivative_wrappers.jl

@@ -258,13 +258,11 @@ function jacobian!(J::AbstractMatrix{<:Number}, f, x::AbstractArray{<:Number},
     nothing
 end
 
-function build_jac_config(alg, f::F1, uf::F2, du1, uprev, u, tmp, du2,
-        ::Val{transform} = Val(true)) where {transform, F1, F2}
+function build_jac_config(alg, f::F1, uf::F2, du1, uprev, u, tmp, du2) where {F1, F2}
     haslinsolve = hasfield(typeof(alg), :linsolve)
 
     if !DiffEqBase.has_jac(f) && # No Jacobian if has analytical solution
-       (transform || !DiffEqBase.has_Wfact(f)) && # No Jacobian if has_Wfact and Wfact is the one that's used
-       (!transform || !DiffEqBase.has_Wfact_t(f)) && # No Jacobian has_Wfact and Wfact_t is the one that's used
+       (!DiffEqBase.has_Wfact_t(f)) &&
        ((concrete_jac(alg) === nothing && (!haslinsolve || (haslinsolve && # No Jacobian if linsolve doesn't want it
            (alg.linsolve === nothing || LinearSolve.needs_concrete_A(alg.linsolve))))) ||
         (concrete_jac(alg) !== nothing && concrete_jac(alg))) # Jacobian if explicitly asked for