refactor: drop unused contract preloading infrastructure

runtime/near-vm-runner/Cargo.toml

@@ -32,7 +32,6 @@ near-vm-errors = { path = "../near-vm-errors" }
 near-primitives = { path = "../../core/primitives" }
 near-stable-hasher = { path = "../../utils/near-stable-hasher" }
 tracing = { version = "0.1", default-features = false }
-threadpool = "1.8.1"
 
 # Old versions of pwasm-utils we need to preserve backwards compatibility under
 # old protocol versions.

runtime/near-vm-runner/src/lib.rs

@@ -6,8 +6,6 @@ mod imports;
 mod instrument;
 #[cfg(all(feature = "wasmer0_vm", target_arch = "x86_64"))]
 mod memory;
-#[cfg(target_arch = "x86_64")]
-mod preload;
 pub mod prepare;
 mod runner;
 #[cfg(test)]
@@ -26,8 +24,6 @@ pub use near_vm_logic::with_ext_cost_counter;
 pub use cache::{
     get_contract_cache_key, precompile_contract, precompile_contract_vm, MockCompiledContractCache,
 };
-#[cfg(target_arch = "x86_64")]
-pub use preload::{ContractCallPrepareRequest, ContractCallPrepareResult, ContractCaller};
 pub use runner::{run, VMResult, VM};
 
 /// This is public for internal experimentation use only, and should otherwise be considered an

runtime/near-vm-runner/src/tests.rs

@@ -1,6 +1,5 @@
 mod cache;
 mod compile_errors;
-mod contract_preload;
 mod rs_contract;
 mod runtime_errors;
 pub(crate) mod test_builder;