[wasm] Remove non-standard kExprI8Const bytecode

src/wasm/wasm-text.cc

 // 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.
 
 #include "src/wasm/wasm-text.h"
 
 #include "src/debug/interface-types.h"
 #include "src/ostreams.h"
 #include "src/vector.h"
 #include "src/wasm/function-body-decoder.h"
@@ skipping 246 matching lines @@
         GlobalIndexOperand operand(&i, i.pc());
         os << GetOpName(opcode) << ' ' << operand.index;
         break;
       }
 #define CASE_CONST(type, str, cast_type)                           \
   case kExpr##type##Const: {                                       \
     Imm##type##Operand operand(&i, i.pc());                        \
     os << #str ".const " << static_cast<cast_type>(operand.value); \
     break;                                                         \
   }
-        CASE_CONST(I8, i8, int32_t)
         CASE_CONST(I32, i32, int32_t)
         CASE_CONST(I64, i64, int64_t)
         CASE_CONST(F32, f32, float)
         CASE_CONST(F64, f64, double)
 
 #define CASE_OPCODE(opcode, _, __) case kExpr##opcode:
         FOREACH_LOAD_MEM_OPCODE(CASE_OPCODE)
         FOREACH_STORE_MEM_OPCODE(CASE_OPCODE) {
           MemoryAccessOperand operand(&i, i.pc(), kMaxUInt32);
           os << GetOpName(opcode) << " offset=" << operand.offset
@@ skipping 27 matching lines @@
       default:
         UNREACHABLE();
         break;
     }
     os << '\n';
     ++line_nr;
   }
   DCHECK_EQ(0, control_depth);
   DCHECK(i.ok());
 }