feat: review sink reactions

[sulheim]

Description of the issue:

There are currently 26 sink reactions in the model:

DM_2hymeph_c
DM_2mborn_c
DM_33biflav_c
DM_38biflav_c
DM_4crsol_c
DM_5drib_c
DM_ACT_c
DM_RED_c
DM_aacald_c
DM_acetone_c
DM_aconm_c
DM_ahop_c
DM_albflon_c
DM_amob_c
DM_dalua_c
DM_ectoine__L_c
DM_geosmin_c
DM_germicidinA_c
DM_germicidinB_c
DM_germicidinC_c
DM_germicidinD_c
DM_grmcrnd_c
DM_mmyA_c
DM_mmyB_c
DM_msh_c
DM_strprub_c

At least the sink reactions for red and act can be removed as there are transport and proper exchange reactions for these compounds. I suggest to do a full review to see

• Which sink reactions can be removed immediately, and remove them
• Search for transport reactions for the other compunds to see if some of the sink reactions can be replaced by transport and exchange reactions.

I hereby confirm that:

• This problem persists in the master branch of the repository
• A similar issue does not already exist
• I've considered asking this first in the Gitter chat room