disable simd and relaxed-simd in the fuzzer for now

Author: Robbepop

crates/fuzz/src/config.rs

@@ -89,8 +89,8 @@ impl Arbitrary<'_> for FuzzSmithConfig {
             custom_page_sizes_enabled: true,
             bulk_memory_enabled: true,
             reference_types_enabled: false, // TODO: re-enable reference-types for differential fuzzing
-            simd_enabled: true,
-            relaxed_simd_enabled: true,
+            simd_enabled: false,
+            relaxed_simd_enabled: false,
             multi_value_enabled: true,
             memory64_enabled: true,
             saturating_float_to_int_enabled: true,