Address review comments

crates/containerd-shim-wasmtime/src/instance.rs

@@ -80,10 +80,7 @@ impl<T: WasiConfig> Default for WasmtimeEngine<T> {
         let mut config = T::new_config();
         config.async_support(true); // must be on
 
-        if let Some(true) = use_pooling_allocator_by_default()
-            .context("failed to determine allocation strategy")
-            .unwrap()
-        {
+        if use_pooling_allocator_by_default().unwrap_or_default() {
             let cfg = wasmtime::PoolingAllocationConfig::default();
             config.allocation_strategy(wasmtime::InstanceAllocationStrategy::Pooling(cfg));
         }
@@ -450,18 +447,15 @@ async fn wait_for_signal() -> Result<i32> {
 /// The pooling allocator is tailor made for the `wasi/http` use case. Check if we can use it.
 ///
 /// For more details refer to: <https://github.com/bytecodealliance/wasmtime/blob/v27.0.0/src/commands/serve.rs#L641>
-fn use_pooling_allocator_by_default() -> Result<Option<bool>> {
+fn use_pooling_allocator_by_default() -> Result<bool> {
     const BITS_TO_TEST: u32 = 42;
     let mut config = Config::new();
     config.wasm_memory64(true);
     let engine = wasmtime::Engine::new(&config)?;
     let mut store = Store::new(&engine, ());
     let ty = wasmtime::MemoryType::new64(0, Some(1 << (BITS_TO_TEST - 16)));
-    if wasmtime::Memory::new(&mut store, ty).is_ok() {
-        Ok(Some(true))
-    } else {
-        Ok(None)
-    }
+
+    Ok(wasmtime::Memory::new(&mut store, ty).is_ok())
 }
 
 pub trait IntoErrorCode {