[wasm] Remove non-standard kExprI8Const bytecode

test/mjsunit/wasm/wasm-constants.js

 // Copyright 2015 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.
 
 // Flags: --expose-wasm
 
 function bytes() {
   var buffer = new ArrayBuffer(arguments.length);
   var view = new Uint8Array(buffer);
   for (var i = 0; i < arguments.length; i++) {
@@ skipping 149 matching lines @@
 let kExprSelect = 0x1b;
 let kExprGetLocal = 0x20;
 let kExprSetLocal = 0x21;
 let kExprTeeLocal = 0x22;
 let kExprGetGlobal = 0x23;
 let kExprSetGlobal = 0x24;
 let kExprI32Const = 0x41;
 let kExprI64Const = 0x42;
 let kExprF32Const = 0x43;
 let kExprF64Const = 0x44;
-let kExprI8Const = 0xcb;
 let kExprI32LoadMem = 0x28;
 let kExprI64LoadMem = 0x29;
 let kExprF32LoadMem = 0x2a;
 let kExprF64LoadMem = 0x2b;
 let kExprI32LoadMem8S = 0x2c;
 let kExprI32LoadMem8U = 0x2d;
 let kExprI32LoadMem16S = 0x2e;
 let kExprI32LoadMem16U = 0x2f;
 let kExprI64LoadMem8S = 0x30;
 let kExprI64LoadMem8U = 0x31;
@@ skipping 185 matching lines @@
         eval(code);
       }
     } catch (e) {
       assertEquals("number", typeof e);
       assertEquals(value, e);
       // Success.
       return;
     }
     throw new MjsUnitAssertionError("Did not throw at all, expected: " + value);
 }