Formula provides nutrition for babies who are unable to nurse, and are as yet incapable of digesting solid food well.
It's a *little* early, but common sense seems to say, why not toss the formula and keep with the solids? Sounds like she's been loving solids for two months now, and doing well with them.
Of course, being a baby she still needs a super high fat diet (for neural development), and way more nutrients/minerals found in our typical food... but you can do that yourself by using whole milk + lots of other high fat & high protein / nutrient dense foods. Just remember LOTS of fats, animal and vegetable (think milk/cheese and avocado/olive oil), in addition to standard foods.
<grinning> And also don't forget the magic #2. At 2 years old a neurochemical thing happens that labels all new chemicals that haven't been ingested yet as poisonous. This counts for both belladonna & drain cleaner AS WELL AS hummus and broccoli. So avoid "toddler" food. Do exactly as you are; the same food YOU eat (and as many ethnicities as you can squeeze in), just prepared mushy.