fixup! feat: support update_initializeprob!

Author: AayushSabharwal

src/systems/diffeqs/abstractodesystem.jl

@@ -885,8 +885,7 @@ function process_DEProblem(constructor, sys::AbstractODESystem, u0map, parammap;
         getpunknowns = getu(initializeprob, punknowns)
         setpunknowns = setp(sys, punknowns)
         initializeprobpmap = GetUpdatedMTKParameters(getpunknowns, setpunknowns)
-        reqd_syms = vcat(
-            variable_symbols(initializeprob), parameter_symbols(initializeprob))
+        reqd_syms = parameter_symbols(initializeprob)
         update_initializeprob! = UpdateInitializeprob(
             getu(sys, reqd_syms), setu(initializeprob, reqd_syms))