Removing a bridesmaid from the wedding party???

Has anyone ever had to remove a bridesmaid from their wedding party? How did you handle it? I know this question tends to offend some, so please be gentle! I hate hurting feelings, but I'm stressed to tears. It's a long story, but I'm starting to think I made the wrong choice & that I can't rely on this girl. I don't expect my girls to do anything but be there to celebrate w/ me. But one is making it ALL about her. She lectured me that the bridesmaid dress/color needs to suit her body/skin tone. The other girls agreed they all wanted to shop together with me for their bridesmaid dresses, but this one decided it need to be planned around her schedule. In general social situations: she's been putting me down, flaking out/not showing up, or showing up 45 minutes late because she wanted to "sleep in" or similar excuses. I tried talking to her, but she throws a fit like a 5 year old. I haven't talked to her in a few months now. I don't know what to do at this point. What would you do?