Clean up vcg wp store case

theories/vcgen/vcgen.v

@@ -122,8 +122,8 @@ Section vcg.
     | _ =>
        mapsto_wand_list E m (∃ (l : loc) (v : val),
          ⌜dval_interp E dv1 = #l⌝ ∧
-         dloc_interp E (dLocUnknown l) ↦C v ∗
-         (dloc_interp E (dLocUnknown l) ↦C[LLvl] dval_interp E dv2 -∗
+         l ↦C v ∗
+         (l ↦C[LLvl] dval_interp E dv2 -∗
           vcg_wp_continuation E Φ (dval_interp E dv2)))%I
     end%I.