[wasm] Remove the use of the "external" bit on OldFunctions section.

test/unittests/wasm/ast-decoder-unittest.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 "test/unittests/test-utils.h"
 
 #include "src/v8.h"
 
 #include "test/cctest/wasm/test-signatures.h"
 
@@ skipping 1163 matching lines @@
                              0,        // func_index
                              0,        // sig_index
                              0,        // name_offset
                              0,        // name_length
                              0,        // code_start_offset
                              0,        // code_end_offset
                              0,        // local_i32_count
                              0,        // local_i64_count
                              0,        // local_f32_count
                              0,        // local_f64_count
-                             false,    // exported
-                             false});  // external
+                             false});  // exported
     CHECK(mod.functions.size() <= 127);
     return static_cast<byte>(mod.functions.size() - 1);
   }
   byte AddImport(FunctionSig* sig) {
     mod.import_table.push_back({sig,  // sig
                                 0,    // sig_index
                                 0,    // module_name_offset
                                 0,    // module_name_length
                                 0,    // function_name_offset
                                 0});  // function_name_length
@@ skipping 1246 matching lines @@
   size_t pos = 0;
   pos = ExpectRun(map, pos, kAstF32, 5);
   pos = ExpectRun(map, pos, kAstI32, 1337);
   pos = ExpectRun(map, pos, kAstI64, 212);
   delete[] data;
 }
 
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8