Remove bridges subtree

bridges/chains/chain-polkadot/Cargo.toml

@@ -1,36 +0,0 @@
-[package]
-name = "bp-polkadot"
-description = "Primitives of Polkadot runtime."
-version = "0.5.0"
-authors.workspace = true
-edition.workspace = true
-license = "GPL-3.0-or-later WITH Classpath-exception-2.0"
-repository.workspace = true
-
-[lints]
-workspace = true
-
-[dependencies]
-
-# Bridge Dependencies
-
-bp-header-chain = { path = "../../primitives/header-chain", default-features = false }
-bp-polkadot-core = { path = "../../primitives/polkadot-core", default-features = false }
-bp-runtime = { path = "../../primitives/runtime", default-features = false }
-
-# Substrate Based Dependencies
-
-frame-support = { path = "../../../substrate/frame/support", default-features = false }
-sp-api = { path = "../../../substrate/primitives/api", default-features = false }
-sp-std = { path = "../../../substrate/primitives/std", default-features = false }
-
-[features]
-default = ["std"]
-std = [
-	"bp-header-chain/std",
-	"bp-polkadot-core/std",
-	"bp-runtime/std",
-	"frame-support/std",
-	"sp-api/std",
-	"sp-std/std",
-]