Remove one more dependency

Author: tomhoule

examples/web/Cargo.toml

@@ -13,7 +13,6 @@ wasm-bindgen = "^0.2"
 serde = { version = "1.0.67", features = ["derive"] }
 lazy_static = "1.0.1"
 js-sys = "0.3.6"
-futures-util = "0.3.8"
 wasm-bindgen-futures = "0.4.18"
 reqwest = "0.11.3"