I got news for ya. Those calf muscles you think are straight up muscle?
VERY UNLIKELY.
I admit - I have not seen or felt your calves but more than likely the fat is packed in there so tight you don't realize it's fat. I've seen this with many people.
This is probably good news for you though - because your calves will most likely shrink as you lose fat dispite the fact that ever step you take works your calf muscles. (Don't worry about weight training working them ... calf muscles are exceedingly difficult to grow)
However, if your calves are all muscle now and they don't shrink you should not dispair. Many men find big strong calf muscles very sexy.