[WASM] Simplify SIMD shuffle opcodes.

test/unittests/wasm/function-body-decoder-unittest.cc

Index: test/unittests/wasm/function-body-decoder-unittest.cc
diff --git a/test/unittests/wasm/function-body-decoder-unittest.cc b/test/unittests/wasm/function-body-decoder-unittest.cc
index 175b2d70cac7ad4e695cee04e03d857c2acd959e..781fc01b65b89df9ee62633528102b23d18b8ca6 100644
--- a/test/unittests/wasm/function-body-decoder-unittest.cc
+++ b/test/unittests/wasm/function-body-decoder-unittest.cc
@@ -2625,8 +2625,6 @@ TEST_F(WasmOpcodeLengthTest, SimdExpressions) {
   EXPECT_LENGTH_N(3, kSimdPrefix, static_cast<byte>(kExpr##name & 0xff));
   FOREACH_SIMD_1_OPERAND_OPCODE(TEST_SIMD)
 #undef TEST_SIMD
-  EXPECT_LENGTH_N(6, kSimdPrefix, static_cast<byte>(kExprS32x4Shuffle & 0xff));
-  EXPECT_LENGTH_N(10, kSimdPrefix, static_cast<byte>(kExprS16x8Shuffle & 0xff));
   EXPECT_LENGTH_N(18, kSimdPrefix, static_cast<byte>(kExprS8x16Shuffle & 0xff));
 #undef TEST_SIMD
   // test for bad simd opcode