message: Remove unused error in AggregateError, this one now belongs to Value
diff: @@ -13,9 +13,6 @@ pub enum AggregateError {
  #[error("only identifier is allowed in aggregation")]
  OnlyIdentifierAllowed,
  - #[error("floating point numbers cannot be grouped")]
  - FloatCannotBeGrouped,
  -
  #[error("unreachable")]
  Unreachable,
  }
  