fixup! refactor: directly solve initialization problem in linearization_function

Author: AayushSabharwal

src/systems/abstractsystem.jl

@@ -1774,8 +1774,10 @@ function linearization_function(sys::AbstractSystem, inputs,
         op = merge(defs, op)
     end
     sys = ssys
-    initsys = complete(generate_initializesystem(
-        sys, guesses = guesses(sys), algebraic_only = true))
+    initsys = structural_simplify(
+        generate_initializesystem(
+            sys, guesses = guesses(sys), algebraic_only = true),
+        fully_determined = false)
     if p isa SciMLBase.NullParameters
         p = Dict()
     else