[wasm] Remove some dead methods from AST decoder.

src/wasm/ast-decoder.cc

 // 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.
 
 #include "src/signature.h"
 
 #include "src/bit-vector.h"
 #include "src/flags.h"
 #include "src/handles.h"
 #include "src/zone-containers.h"
@@ skipping 91 matching lines @@
       : Decoder(start, end),
         module_(module),
         sig_(sig),
         total_locals_(0),
         local_types_(nullptr) {}
   ModuleEnv* module_;
   FunctionSig* sig_;
   size_t total_locals_;
   ZoneVector<LocalType>* local_types_;
 
-  byte ByteOperand(const byte* pc, const char* msg = "missing 1-byte operand") {
-    if ((pc + sizeof(byte)) >= limit_) {
-      error(pc, msg);
-      return 0;
-    }
-    return pc[1];
-  }
-
-  uint32_t Uint32Operand(const byte* pc) {
-    if ((pc + sizeof(uint32_t)) >= limit_) {
-      error(pc, "missing 4-byte operand");
-      return 0;
-    }
-    return read_u32(pc + 1);
-  }
-
-  uint64_t Uint64Operand(const byte* pc) {
-    if ((pc + sizeof(uint64_t)) >= limit_) {
-      error(pc, "missing 8-byte operand");
-      return 0;
-    }
-    return read_u64(pc + 1);
-  }
-
   inline bool Validate(const byte* pc, LocalIndexOperand& operand) {
     if (operand.index < total_locals_) {
       if (local_types_) {
         operand.type = local_types_->at(operand.index);
       } else {
         operand.type = kAstStmt;
       }
       return true;
     }
     error(pc, pc + 1, "invalid local index");
@@ skipping 1533 matching lines @@
 BitVector* AnalyzeLoopAssignmentForTesting(Zone* zone, size_t num_locals,
                                            const byte* start, const byte* end) {
   FunctionBody body = {nullptr, nullptr, nullptr, start, end};
   SR_WasmDecoder decoder(zone, nullptr, body);
   return decoder.AnalyzeLoopAssignmentForTesting(start, num_locals);
 }
 
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8