refactor: remove left over blocking

crates/cashu-sdk/Cargo.toml

@@ -12,7 +12,7 @@ license.workspace = true
 [features]
 default = ["mint", "wallet", "all-nuts", "redb"]
 mint = ["cashu/mint"]
-wallet = ["cashu/wallet", "dep:minreq", "dep:once_cell"]
+wallet = ["cashu/wallet", "dep:minreq"]
 gloo = ["dep:gloo"]
 all-nuts = ["nut07", "nut08", "nut09", "nut10", "nut11", "nut12", "nut13"]
 nut07 = ["cashu/nut07"]
@@ -32,8 +32,6 @@ serde = { workspace = true }
 serde_json = { workspace = true }
 url = { workspace = true }
 tracing = { workspace = true }
-futures-util = { version = "0.3", default-features = false, features = ["sink", "std"] }
-once_cell = { version = "1.17", optional = true }
 thiserror = { workspace = true }
 async-trait = "0.1.74"
 gloo = { version = "0.11.0", optional = true, features = ["net"] }

crates/cashu-sdk/src/lib.rs

@@ -1,13 +1,3 @@
-#[cfg(all(target_arch = "wasm32", feature = "blocking"))]
-compile_error!("`blocking` feature can't be enabled for WASM targets");
-
-#[cfg(feature = "blocking")]
-use futures_util::Future;
-#[cfg(feature = "blocking")]
-use once_cell::sync::Lazy;
-#[cfg(feature = "blocking")]
-use tokio::runtime::Runtime;
-
 #[cfg(feature = "wallet")]
 pub mod client;
 
@@ -19,11 +9,3 @@ pub mod wallet;
 
 pub use bip39::Mnemonic;
 pub use cashu::{self, *};
-
-#[cfg(feature = "blocking")]
-static RUNTIME: Lazy<Runtime> = Lazy::new(|| Runtime::new().expect("Can't start Tokio runtime"));
-
-#[cfg(feature = "blocking")]
-pub fn block_on<F: Future>(future: F) -> F::Output {
-    RUNTIME.block_on(future)
-}