Remove always-on logging from fuzz targets (#878)

Now that the `cargo fuzz` tooling is better, it is easier to reproduce failures,
and we don't need to be super paranoid about logging here.

fuzz/fuzz_targets/instantiate_translated.rs

@@ -2,11 +2,8 @@
 
 use libfuzzer_sys::fuzz_target;
 use wasmtime::Strategy;
-use wasmtime_fuzzing::{generators, oracles, with_log_wasm_test_case};
+use wasmtime_fuzzing::{generators, oracles};
 
 fuzz_target!(|data: generators::WasmOptTtf| {
-    with_log_wasm_test_case!(&data.wasm, |wasm| oracles::instantiate(
-        wasm,
-        Strategy::Auto,
-    ));
+    oracles::instantiate(&data.wasm, Strategy::Auto);
 });