Remove either feature

crates/ruma-common/Cargo.toml

@@ -46,7 +46,6 @@ unstable-msc3554 = ["unstable-msc1767"]
 base64 = "0.13.0"
 bytes = "1.0.1"
 criterion = { version = "0.3.3", optional = true }
-either = { version = "1.6.1", optional = true }
 form_urlencoded = "1.0.0"
 http = { version = "0.2.2", optional = true }
 indexmap = { version = "1.6.2", features = ["serde-1"] }

crates/ruma-common/src/identifiers/room_or_room_alias_id.rs

@@ -51,18 +51,6 @@ impl RoomOrAliasId {
         self.variant() == Variant::RoomAliasId
     }
 
-    /// Turn this `RoomOrAliasId` into `Either<RoomId, RoomAliasId>`
-    #[cfg(feature = "either")]
-    pub fn into_either(self: Box<Self>) -> either::Either<Box<RoomId>, Box<RoomAliasId>> {
-        let variant = self.variant();
-        let boxed_str = self.into_owned();
-
-        match variant {
-            Variant::RoomId => either::Either::Left(RoomId::from_box(boxed_str)),
-            Variant::RoomAliasId => either::Either::Right(RoomAliasId::from_box(boxed_str)),
-        }
-    }
-
     fn colon_idx(&self) -> usize {
         self.as_str().find(':').unwrap()
     }

crates/ruma/Cargo.toml

@@ -54,7 +54,6 @@ push-gateway-api-s = ["api", "ruma-push-gateway-api/server"]
 push-gateway-api = ["push-gateway-api-c", "push-gateway-api-s"]
 
 # Convenience features
-either = ["ruma-common/either"]
 rand = ["ruma-common/rand"]
 markdown = ["ruma-common/markdown"]
 
@@ -71,7 +70,6 @@ full = [
     "federation-api",
     "identity-service-api",
     "push-gateway-api",
-    "either",
     "rand",
     "markdown",
 ]