remove some dodgy defines from the ICGM filter

One of these looks it was somebodys temporary debugging code.
The others constants are are always defined,
so the #ifdef blocks are pointless.

Change-Id: I4817e9ce268ab58f5e329830e2e332e2b4ebf4dc
Reviewed-on: https://gerrit.libreoffice.org/9163
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>