[snapshot] remove metadata field.

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index 6a7f944ccaa9302c7a29e609b76fbcadfdb658a5..255ac0e90cf1b41480ab7d9feb3d66bb7d8a7857 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -5543,8 +5543,8 @@ class V8_EXPORT Isolate {
      * The optional entry_hook allows the host application to provide the
      * address of a function that's invoked on entry to every V8-generated
      * function.  Note that entry_hook is invoked at the very start of each
-     * generated function. Furthermore, if an  entry_hook is given, V8 will
-     * always run without a context snapshot.
+     * generated function. Furthermore, if an entry_hook is given, V8 will
+     * not use a snapshot, including custom snapshots.
      */
     FunctionEntryHook entry_hook;