Revert "multifilesink: close file on write error with next-file mode is set to buffer"

This reverts commit 84e441d2.

This will no longer be needed once we revert f1ceaab0.

gst/multifile/gstmultifilesink.c

@@ -626,10 +626,8 @@ gst_multi_file_sink_write_buffer (GstMultiFileSink * multifilesink,
           "Writing buffer data (%" G_GSIZE_FORMAT " bytes) to new file",
           map.size);
       ret = fwrite (map.data, map.size, 1, multifilesink->file);
-      if (ret != 1) {
-        gst_multi_file_sink_close_file (multifilesink, NULL);
+      if (ret != 1)
         goto stdio_write_error;
-      }
 
       gst_multi_file_sink_close_file (multifilesink, buffer);
       break;