message: simplify variance Strip
diff: @@ -64,7 +64,4 @@ export type Initial<C, P extends Param> = C extends V<P, "-">
  ? never
  : any
  -export type Strip<C, P extends Param> = Erase<
  - Erase<Erase<C, V<P, "+">>, V<P, "-">>,
  - V<P, "_">
  ->
  +export type Strip<C, P extends Param> = Erase<C, V<P, "_"> & V<P, "-"> & V<P, "+">>
  