[wasm] Move 64-bit call tests into test-run-wasm-64.cc so they also run on 32-bit platforms.

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 8aa8cff940d050a7aff1ead5d5367569bcae970c..c2c10208d6f45d69f8c2583405f67d857f1742ba 100644
--- a/test/cctest/wasm/wasm-run-utils.h
+++ b/test/cctest/wasm/wasm-run-utils.h
@@ -33,13 +33,6 @@
 #include "test/cctest/compiler/call-tester.h"
 #include "test/cctest/compiler/graph-builder-tester.h"
 
-// TODO(titzer): pull WASM_64 up to a common header.
-#if !V8_TARGET_ARCH_32_BIT || V8_TARGET_ARCH_X64
-#define WASM_64 1
-#else
-#define WASM_64 0
-#endif
-
 static const uint32_t kMaxFunctions = 10;
 
 enum WasmExecutionMode { kExecuteInterpreted, kExecuteCompiled };