Fix build of wasi-nn

crates/wasi-nn/src/lib.rs

@@ -18,7 +18,6 @@ wasmtime_wiggle::wasmtime_integration!({
         wasi_ephemeral_nn => {
           name: WasiNn,
           docs: "An instantiated instance of the wasi-nn exports.",
-          function_override: {}
         }
     },
 });