Layered cursor now supports debug copy option after WT-16926, layered cursor now supports debug copy options. So the following code is no longer valid and we should remove them:

        /* Layered cursor is not compatible with cursor_copy config. */
        F_CLR(clayered->ingest_cursor, WT_CURSTD_DEBUG_COPY_KEY | WT_CURSTD_DEBUG_COPY_VALUE);

It also doesn't really disable the feature because as long as the feature is enabled on the connection, these flags will be set again on the cursors.