I don't worry about not feeding iron-fortified foods. I haven't started any solids with my 7 mo DS yet, but when I do, they'll all be homemade. The way I see it is that God (insert nature here if you prefer) made us to survive. We don't need foods with extra stuff added in, even if the stuff added is supposedly "good." If our teeth needed lots of floride, there would be floride in lots of foods. If we needed more vitamin D than our bodies could make and if the sun were really all that bad for us, there would be more vitamin D in foods. Likewise, if babies needed extra iron, there would be more iron in foods that babies typically eat.
The iron that's in formula and the baby foods that have it added is poorly digested. Iron started to be added to foods when most moms were formula feeding. While breastmilk doesn't have a lot of iron, it's very absorbable. I wouldn't worry about it. When you introduce meats (if you're not vegetarian), you might want to pair them with foods with vitamin C to increase the iron absorbtion, but it can't be bad to give your baby food as it occurs in nature.