Remove polkadot-validation crate (#2271)

polkadot/Cargo.lock

@@ -5884,34 +5884,6 @@ dependencies = [
  "tracing-futures",
 ]
 
-[[package]]
-name = "polkadot-validation"
-version = "0.8.27"
-dependencies = [
- "futures 0.3.10",
- "log",
- "parity-scale-codec",
- "polkadot-parachain",
- "polkadot-primitives",
- "sc-basic-authorship",
- "sc-block-builder",
- "sc-client-api",
- "sc-finality-grandpa",
- "sp-api",
- "sp-blockchain",
- "sp-consensus",
- "sp-consensus-babe",
- "sp-core",
- "sp-inherents",
- "sp-keyring",
- "sp-runtime",
- "sp-timestamp",
- "sp-transaction-pool",
- "sp-trie",
- "substrate-prometheus-endpoint",
- "thiserror",
-]
-
 [[package]]
 name = "polling"
 version = "2.0.2"