prescribed aerosols and oslo_aero

[mvertens]

In build-namelist the following section of code hard-wires the variable prescribed_aerosols. Is this still needed?

   if( $chem =~ /_oslo/){
    $prescribe_aerosols = $FALSE;
    print " ==> Using Oslo aerosols: PRESCRIBED AERO = FALSE (not yet implemented) \n"
}