chore: shorten pole (#14242)

This PR shortens the pole.

Author: TwoFX

src/Lean/Elab/Tactic/Do/Internal/VCGen/Reduce.lean

@@ -8,7 +8,7 @@ module
 prelude
 public import Lean.Meta.Sym.SymM
 import Lean.Meta.WHNF
-import Lean.Meta.Sym
+import Lean.Meta.Sym.Util
 
 open Lean Meta Sym