Fix new rust remover script

The reason I did this is because currently the script is not working, due to looking into the config table when using rust remover on Ex.itemid. 

Changes are:
•assigned a var to Item(itemEx.uid)
•If it's not one of the targets from the config table, it will return true
•when you use a rust remover on one of the items, it will now look into targetItem table (config[itemEx.itemid]) instead of the whole config table