remove old Dart API

ios/src/dart_api_dl.c

@@ -1,59 +0,0 @@
-/*
- * Copyright (c) 2020, the Dart project authors.  Please see the AUTHORS file
- * for details. All rights reserved. Use of this source code is governed by a
- * BSD-style license that can be found in the LICENSE file.
- */
-
-#include "dart_api_dl.h"               /* NOLINT */
-#include "dart_version.h"              /* NOLINT */
-#include "internal/dart_api_dl_impl.h" /* NOLINT */
-
-#include <string.h>
-
-#define DART_API_DL_DEFINITIONS(name, R, A) name##_Type name##_DL = NULL;
-
-DART_API_ALL_DL_SYMBOLS(DART_API_DL_DEFINITIONS)
-
-#undef DART_API_DL_DEFINITIONS
-
-typedef void* DartApiEntry_function;
-
-DartApiEntry_function FindFunctionPointer(const DartApiEntry* entries,
-                                          const char* name) {
-  while (entries->name != NULL) {
-    if (strcmp(entries->name, name) == 0) return entries->function;
-    entries++;
-  }
-  return NULL;
-}
-
-intptr_t Dart_InitializeApiDL(void* data) {
-  DartApi* dart_api_data = (DartApi*)data;
-
-  if (dart_api_data->major != DART_API_DL_MAJOR_VERSION) {
-    // If the DartVM we're running on does not have the same version as this
-    // file was compiled against, refuse to initialize. The symbols are not
-    // compatible.
-    return -1;
-  }
-  // Minor versions are allowed to be different.
-  // If the DartVM has a higher minor version, it will provide more symbols
-  // than we initialize here.
-  // If the DartVM has a lower minor version, it will not provide all symbols.
-  // In that case, we leave the missing symbols un-initialized. Those symbols
-  // should not be used by the Dart and native code. The client is responsible
-  // for checking the minor version number himself based on which symbols it
-  // is using.
-  // (If we would error out on this case, recompiling native code against a
-  // newer SDK would break all uses on older SDKs, which is too strict.)
-
-  const DartApiEntry* dart_api_function_pointers = dart_api_data->functions;
-
-#define DART_API_DL_INIT(name, R, A)                                           \
-  name##_DL =                                                                  \
-      (name##_Type)(FindFunctionPointer(dart_api_function_pointers, #name));
-  DART_API_ALL_DL_SYMBOLS(DART_API_DL_INIT)
-#undef DART_API_DL_INIT
-
-  return 0;
-}