Remove old migrations & macros

[wake42]

Remove old migrations in preparation for an upcoming rewrite of the migration code.
Also check if provided macros should be removed / updated.

Removed most migrations, except the new ones and some for reference. The remaining will be removed or rewritten in #654
Note especially that the removal of migrateWeaponItemDamageBonus will make sure any weapon damage bonus definitions are not overwritten when updating the system.

Only the assign rqid to journals macro is left
assign-rqid-to-hit-locations does not work after hit location setting was removed, and migrate-old-journal-links should not be necessary anymore.