remove duplicated arm and fix version index

xcm/src/lib.rs

@@ -300,88 +300,6 @@ macro_rules! versioned_type {
 			}
 		}
 	};
-
-	($(#[$attr:meta])* pub enum $n:ident {
-		V2($v2:ty),
-		V3($v3:ty),
-	}) => {
-		#[derive(Derivative, Encode, Decode, TypeInfo)]
-		#[derivative(Clone(bound = ""), Eq(bound = ""), PartialEq(bound = ""), Debug(bound = ""))]
-		#[codec(encode_bound())]
-		#[codec(decode_bound())]
-		$(#[$attr])*
-		pub enum $n {
-			#[codec(index = 1)]
-			V2($v2),
-			#[codec(index = 2)]
-			V3($v3),
-		}
-		impl $n {
-			pub fn try_as<T>(&self) -> Result<&T, ()> where Self: TryAs<T> {
-				<Self as TryAs<T>>::try_as(&self)
-			}
-		}
-		impl TryAs<$v2> for $n {
-			fn try_as(&self) -> Result<&$v2, ()> {
-				match &self {
-					Self::V2(ref x) => Ok(x),
-					_ => Err(()),
-				}
-			}
-		}
-		impl TryAs<$v3> for $n {
-			fn try_as(&self) -> Result<&$v3, ()> {
-				match &self {
-					Self::V3(ref x) => Ok(x),
-					_ => Err(()),
-				}
-			}
-		}
-		impl IntoVersion for $n {
-			fn into_version(self, n: Version) -> Result<Self, ()> {
-				Ok(match n {
-					2 => Self::V2(self.try_into()?),
-					3 => Self::V3(self.try_into()?),
-					_ => return Err(()),
-				})
-			}
-		}
-		impl From<$v2> for $n {
-			fn from(x: $v2) -> Self {
-				$n::V2(x)
-			}
-		}
-		impl<T: Into<$v3>> From<T> for $n {
-			fn from(x: T) -> Self {
-				$n::V3(x.into())
-			}
-		}
-		impl TryFrom<$n> for $v2 {
-			type Error = ();
-			fn try_from(x: $n) -> Result<Self, ()> {
-				use $n::*;
-				match x {
-					V2(x) => Ok(x),
-					V3(x) => x.try_into(),
-				}
-			}
-		}
-		impl TryFrom<$n> for $v3 {
-			type Error = ();
-			fn try_from(x: $n) -> Result<Self, ()> {
-				use $n::*;
-				match x {
-					V2(x) => x.try_into(),
-					V3(x) => Ok(x),
-				}
-			}
-		}
-		impl MaxEncodedLen for $n {
-			fn max_encoded_len() -> usize {
-				<$v3>::max_encoded_len()
-			}
-		}
-	}
 }
 
 versioned_type! {