PVF: Remove artifact persistence across restarts (#2895)

Considering the complexity of
https://github.com/paritytech/polkadot-sdk/pull/2871 and the discussion
therein, as well as the further complexity introduced by the hardening
in https://github.com/paritytech/polkadot-sdk/pull/2742, as well as the
eventual replacement of wasmtime by PolkaVM, it seems best to remove
this persistence as it is creating more problems than it solves.

## Related

Closes https://github.com/paritytech/polkadot-sdk/issues/2863

polkadot/node/core/pvf/common/Cargo.toml

@@ -39,9 +39,6 @@ seccompiler = "0.4.0"
 assert_matches = "1.4.0"
 tempfile = "3.3.0"
 
-[build-dependencies]
-substrate-build-script-utils = { path = "../../../../../substrate/utils/build-script-utils" }
-
 [features]
 # This feature is used to export test code to other crates without putting it in the production build.
 test-utils = []

polkadot/node/core/pvf/common/build.rs

@@ -1,19 +0,0 @@
-// Copyright (C) Parity Technologies (UK) Ltd.
-// This file is part of Polkadot.
-
-// Polkadot is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Polkadot is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Polkadot.  If not, see <http://www.gnu.org/licenses/>.
-
-fn main() {
-	substrate_build_script_utils::generate_wasmtime_version();
-}

polkadot/node/core/pvf/common/src/lib.rs

@@ -31,8 +31,6 @@ pub use sp_tracing;
 
 const LOG_TARGET: &str = "parachain::pvf-common";
 
-pub const RUNTIME_VERSION: &str = env!("SUBSTRATE_WASMTIME_VERSION");
-
 use parity_scale_codec::{Decode, Encode};
 use std::{
 	io::{self, Read, Write},