Kill saveAsWithOptions again. (merge error/oversight)

The declaration sneaked in again when merging the libreofficekit
tiled rendering changes, there's no actual implementation or use
of this anywhere though.
(cherry picked from commit 822cf7cb24eaa11ed3aa8d243370fba5bf6af889)
diff --git a/include/LibreOfficeKit/LibreOfficeKit.h b/include/LibreOfficeKit/LibreOfficeKit.h
index 77a8d0f..ba4319f 100644
--- a/include/LibreOfficeKit/LibreOfficeKit.h
+++ b/include/LibreOfficeKit/LibreOfficeKit.h
@@ -72,10 +72,6 @@
                      const char *pUrl,
                      const char *pFormat,
                      const char *pFilterOptions);
-  int (*saveAsWithOptions) (LibreOfficeKitDocument* pThis,
-                            const char *pUrl,
-                            const char *pFormat,
-                            const char *pFilterOptions);
 #ifdef LOK_USE_UNSTABLE_API
   LibreOfficeKitDocumentType (*getDocumentType) (LibreOfficeKitDocument* pThis);