Howdy m8!
Ya need to DELETE the class_names from yer "Mission.sqm" file!
...those removed addons are STILL mentioned in the "addons" part of the mission, m8, so read that file (using NOTEPAD) and delete the unwanted class names.
Here's an example:
=======================
addOns[]=
{
"AGS_harbour",
"Trabant",
"Mini",
"Baracken",
};
addOnsAuto[]=
{
"AGS_harbour",
"Trabant",
"Mini",
"Baracken",
};
===========================
See?! just delete, say "Trabant" if that is what you wanna get rid of.