indexers: remove Sync requirement from AnyResolver

src/indexers/any.rs

@@ -45,7 +45,7 @@ pub trait RgbResolver: Send {
 #[derive(From)]
 #[non_exhaustive]
 pub struct AnyResolver {
-    inner: Arc<dyn RgbResolver + Sync>,
+    inner: Box<dyn RgbResolver>,
     terminal_txes: HashMap<Txid, Tx>,
 }