[wasm] Remove obsolete comment

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

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef WASM_RUN_UTILS_H
 #define WASM_RUN_UTILS_H
 
 #include <setjmp.h>
 #include <stdint.h>
 #include <stdlib.h>
@@ skipping 702 matching lines @@
     if (!interpret()) {
       wrapper_.Init<ReturnType, ParamTypes...>(functions_[0]->descriptor());
     }
   }
 
   ReturnType Call(ParamTypes... p) {
     DCHECK(compiled_);
     if (interpret()) return CallInterpreter(p...);
 
     // Use setjmp/longjmp to deal with traps in WebAssembly code.
-    // Make the return value volatile, to give defined semantics if accessed
-    // after setjmp.
     ReturnType return_value = static_cast<ReturnType>(0xdeadbeefdeadbeef);
     static int setjmp_ret;
     setjmp_ret = setjmp(WasmRunnerBase::jump_buffer);
     // setjmp returns 0 on the first return, 1 (passed to longjmp) after trap.
     if (setjmp_ret == 0) {
       DoCall(static_cast<void*>(&p)..., static_cast<void*>(&return_value));
     }
     return return_value;
   }
 
@@ skipping 61 matching lines @@
   void RunWasm_##name(WasmExecutionMode execution_mode)
 
 #define WASM_EXEC_COMPILED_TEST(name)                                \
   void RunWasm_##name(WasmExecutionMode execution_mode);             \
   TEST(RunWasmCompiled_##name) { RunWasm_##name(kExecuteCompiled); } \
   void RunWasm_##name(WasmExecutionMode execution_mode)
 
 }  // namespace
 
 #endif