[WASM] Simplify SIMD shuffle opcodes.

src/compiler/arm/instruction-codes-arm.h

 // Copyright 2014 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 V8_COMPILER_ARM_INSTRUCTION_CODES_ARM_H_
 #define V8_COMPILER_ARM_INSTRUCTION_CODES_ARM_H_
 
 namespace v8 {
 namespace internal {
 namespace compiler {
@@ skipping 228 matching lines @@
   V(ArmS32x4UnzipRight)            \
   V(ArmS32x4TransposeLeft)         \
   V(ArmS32x4TransposeRight)        \
   V(ArmS32x4Shuffle)               \
   V(ArmS16x8ZipLeft)               \
   V(ArmS16x8ZipRight)              \
   V(ArmS16x8UnzipLeft)             \
   V(ArmS16x8UnzipRight)            \
   V(ArmS16x8TransposeLeft)         \
   V(ArmS16x8TransposeRight)        \
-  V(ArmS16x8Shuffle)               \
   V(ArmS8x16ZipLeft)               \
   V(ArmS8x16ZipRight)              \
   V(ArmS8x16UnzipLeft)             \
   V(ArmS8x16UnzipRight)            \
   V(ArmS8x16TransposeLeft)         \
   V(ArmS8x16TransposeRight)        \
   V(ArmS8x16Concat)                \
   V(ArmS8x16Shuffle)               \
   V(ArmS32x2Reverse)               \
   V(ArmS16x4Reverse)               \
@@ skipping 24 matching lines @@
   V(Operand2_R_ASR_R) /* %r0 ASR %r1 */ \
   V(Operand2_R_LSL_R) /* %r0 LSL %r1 */ \
   V(Operand2_R_LSR_R) /* %r0 LSR %r1 */ \
   V(Operand2_R_ROR_R) /* %r0 ROR %r1 */
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_ARM_INSTRUCTION_CODES_ARM_H_