Revert of Implement WASM big-endian support

test/cctest/wasm/wasm-run-utils.h

Index: test/cctest/wasm/wasm-run-utils.h
diff --git a/test/cctest/wasm/wasm-run-utils.h b/test/cctest/wasm/wasm-run-utils.h
index 4e3cb06d5c0c6e7d6f5dbfe2ddf85151ad252a86..ea4efa5325fc47b3fe2bb558174a7dae34d6fab8 100644
--- a/test/cctest/wasm/wasm-run-utils.h
+++ b/test/cctest/wasm/wasm-run-utils.h
@@ -140,22 +140,14 @@
   template <typename T>
   T raw_mem_at(int i) {
     DCHECK(instance->mem_start);
-    return ReadMemory(&(reinterpret_cast<T*>(instance->mem_start)[i]));
+    return reinterpret_cast<T*>(instance->mem_start)[i];
   }
 
   template <typename T>
   T raw_val_at(int i) {
-    return ReadMemory(reinterpret_cast<T*>(instance->mem_start + i));
-  }
-
-  template <typename T>
-  void WriteMemory(T* p, T val) {
-    WriteLittleEndianValue<T>(p, val);
-  }
-
-  template <typename T>
-  T ReadMemory(T* p) {
-    return ReadLittleEndianValue<T>(p);
+    T val;
+    memcpy(&val, reinterpret_cast<void*>(instance->mem_start + i), sizeof(T));
+    return val;
   }
 
   // Zero-initialize the memory.