message: Try to fix unused import error
diff: @@ -17,7 +17,6 @@ use wasmer::*;
  use wasmer_clif_backend::CraneliftCompiler;
  #[cfg(feature = "backend:llvm")]
  use wasmer_llvm_backend::code::LLVMModuleCodeGenerator;
  -use wasmer_middleware_common::metering::Metering;
  use wasmer_runtime::{
  cache::{Cache as BaseCache, FileSystemCache, WasmHash, WASMER_VERSION_HASH},
  error::RuntimeError,
  @@ -348,6 +347,7 @@ fn execute_wasm(options: &Run) -> Result<(), String> {
  Backend::Singlepass => {
  let c: StreamingCompiler<SinglePassMCG, _, _, _, _> = StreamingCompiler::new(|| {
  let mut chain = MiddlewareChain::new();
  + use wasmer_middleware_common::metering::Metering;
  if let Some(limit) = options.instruction_limit {
  chain.push(Metering::new(limit));
  }
  @@ -363,6 +363,7 @@ fn execute_wasm(options: &Run) -> Result<(), String> {
  let c: StreamingCompiler<LLVMModuleCodeGenerator, _, _, _, _> =
  StreamingCompiler::new(|| {
  let mut chain = MiddlewareChain::new();
  + use wasmer_middleware_common::metering::Metering;
  if let Some(limit) = options.instruction_limit {
  chain.push(Metering::new(limit));
  }
  