[wasm] Remove non-standard kExprI8Const bytecode

src/wasm/function-body-decoder.cc

Index: src/wasm/function-body-decoder.cc
diff --git a/src/wasm/function-body-decoder.cc b/src/wasm/function-body-decoder.cc
index a24087aafada55f77da7b216595ac63e8abda350..ae4083ebea95bdc1fe506464c2ed6f2c59d3f6a8 100644
--- a/src/wasm/function-body-decoder.cc
+++ b/src/wasm/function-body-decoder.cc
@@ -422,8 +422,6 @@ class WasmDecoder : public Decoder {
         MemoryIndexOperand operand(decoder, pc);
         return 1 + operand.length;
       }
-      case kExprI8Const:
-        return 2;
       case kExprF32Const:
         return 5;
       case kExprF64Const:
@@ -991,12 +989,6 @@ class WasmFullDecoder : public WasmDecoder {
             EndControl();
             break;
           }
-          case kExprI8Const: {
-            ImmI8Operand operand(this, pc_);
-            Push(kWasmI32, BUILD(Int32Constant, operand.value));
-            len = 1 + operand.length;
-            break;
-          }
           case kExprI32Const: {
             ImmI32Operand operand(this, pc_);
             Push(kWasmI32, BUILD(Int32Constant, operand.value));