This reverts the changes done to the DW2 entries in commit d4a354c1.
We only distinguish between floppy and CD versions if a game had both a
CD and a floppy version released. DW2 was only released as a CD version,
so the extra flagging of the DW2 entries as CD was redundant, and caused
confusion regarding previous saved games to users that readded the DW2
detection entries after this change