configs/baseline/profiledef.sh: do not use mkfs.erofs extended options "fragments" and "dedupe"

These options are not compatible with multi-threaded compression and actually increase the image file size.

With this change, the baseline profile's EROFS image file size is reduced from 488 MiB to 398 MiB. On my system, the compression time is reduced from about 2m6.274s to 1m59.410s when using erofs-utils built without multi-threaded compression and to 0m27.883s when using erofs-utils built with multi-threaded compression.