Revert "Support external startup data in V8."

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index a394ccaeebc884f71125d6686836404c1069a234..25cb84e270d93eeac051d36c51fe096a622349aa 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -4643,24 +4643,6 @@ class V8_EXPORT V8 {
   static void SetDecompressedStartupData(StartupData* decompressed_data);
 
   /**
-   * Hand startup data to V8, in case the embedder has chosen to build
-   * V8 with external startup data.
-   *
-   * Note:
-   * - By default the startup data is linked into the V8 library, in which
-   *   case this function is not meaningful.
-   * - If this needs to be called, it needs to be called before V8
-   *   tries to make use of its built-ins.
-   * - To avoid unnecessary copies of data, V8 will point directly into the
-   *   given data blob, so pretty please keep it around until V8 exit.
-   * - Compression of the startup blob might be useful, but needs to
-   *   handled entirely on the embedders' side.
-   * - The call will abort if the data is invalid.
-   */
-  static void SetNativesDataBlob(StartupData* startup_blob);
-  static void SetSnapshotDataBlob(StartupData* startup_blob);
-
-  /**
    * Adds a message listener.
    *
    * The same message listener can be added more than once and in that