remove flume, implement lazier memos

packages/signals/Cargo.toml

@@ -22,7 +22,6 @@ once_cell = "1.18.0"
 rustc-hash = { workspace = true }
 futures-channel = { workspace = true }
 futures-util = { workspace = true }
-flume = { version = "0.11.0", default-features = false, features = ["async"] }
 
 [dev-dependencies]
 dioxus = { workspace = true }