Removing writeCopyTo overload (#5008)

This removes the types for the overload that got removed with #4987

types/index.d.ts

@@ -1253,17 +1253,6 @@ declare class Realm {
      */
     compact(): boolean;
 
-    /**
-     * Write a copy of a realm at the destination path.  Any user will be able to open and use
-     * the new copy.  Copying a synced realm will create a snapshot of the realm that can be
-     * opened to resume syncing from the server.  Synced realms must be fully synchronized with
-     * the server before calling `writeCopyTo`.
-     * @param path destination path
-     * @param encryptionKey encryption key to use
-     * @returns void
-     */
-    writeCopyTo(path: string, encryptionKey?: ArrayBuffer | ArrayBufferView): void;
-
     /**
      * Writes a compacted copy of the Realm with the given configuration.
      *