Remove the sound played on airflow, due to intense lag and eight-and-a-half million calls of playsound in an hour.

Signed-off-by: Mloc-Argent <colmohici@gmail.com>
Merge pull request #3332 from Mloc/airflowsound

Remove the sound played on airflow, due to intense lag and eight-and-a-h...
Absoloutely massive (1 character) fix for virology.  Pathogenic incubator radiation now goes down as intended.

Signed-off-by: Mloc-Argent <colmohici@gmail.com>