If I could eliminate one thing - it would be attachment. Being attached to people and things brings a lot of self suffering, pain, jealousy, fear - just to name a few.
I would eliminate pain before death. Humans may have to die, at any time during life.. and particularly when old... but I would eliminate the pain that may be felt during an illness or disease that will cause death... no-one who is frail and dying should also have to suffer agonising pain
I eliminated quite a few of these last evening. The little b*gg*rs were planning to take up residence in the kitchen.
Outside they are welcome up until the time that they starting biting my ankles when eating alfresco. That's me and my guests eating al fresco, not the ants. At that point they become redundant.