Remove the wasmtime feature flag (#12684)

* Remove the `wasmtime` feature flag

* rustfmt

substrate/client/service/Cargo.toml

@@ -17,7 +17,6 @@ default = ["rocksdb"]
 # The RocksDB feature activates the RocksDB database backend. If it is not activated, and you pass
 # a path to a database, an error will be produced at runtime.
 rocksdb = ["sc-client-db/rocksdb"]
-wasmtime = ["sc-executor/wasmtime"]
 # exposes the client type
 test-helpers = []
 runtime-benchmarks = ["sc-client-db/runtime-benchmarks"]

substrate/client/service/src/config.rs

@@ -20,9 +20,7 @@
 
 pub use sc_client_api::execution_extensions::{ExecutionStrategies, ExecutionStrategy};
 pub use sc_client_db::{BlocksPruning, Database, DatabaseSource, PruningMode};
-pub use sc_executor::WasmExecutionMethod;
-#[cfg(feature = "wasmtime")]
-pub use sc_executor::WasmtimeInstantiationStrategy;
+pub use sc_executor::{WasmExecutionMethod, WasmtimeInstantiationStrategy};
 pub use sc_network::{
 	config::{NetworkConfiguration, NodeKeyConfig, Role},
 	Multiaddr,