test: remove outdated debug kwarg to expand_connections

Author: AayushSabharwal

test/components.jl

@@ -91,7 +91,7 @@ end
     @named sys′ = System(eqs, t)
     @named sys_inner_outer = compose(sys′, [ground, shape, source, rc_comp])
     @test_nowarn show(IOBuffer(), MIME"text/plain"(), sys_inner_outer)
-    expand_connections(sys_inner_outer, debug = true)
+    expand_connections(sys_inner_outer)
     sys_inner_outer = mtkcompile(sys_inner_outer)
     @test !isempty(ModelingToolkit.defaults(sys_inner_outer))
     u0 = [rc_comp.capacitor.v => 0.0]