You can't remaster something that was never mastered. Mastering is part of the distribute and release process. It's not something that's normally done for every track recorded. What you're thinking about is what is referred to simply as "mastering". It's the process in which an audio engineer equalizes songs and put them in the order they are supposed to be, and basically make a bunch of individual recordings recorded at different times/studios using various equipment into sounding like a coherent album. Before this, panning and individual instrument volume is done by either the producer or a studio engineer. This process is referred to as "mixing".
But besides that, I think she basically meant there won't be any remixing or cutting down outros etc. A lot of people use the word "remaster" differently. On Pacboards it means to make something sound better, but in engineering terms it means taking a mastered recording and re-mastering it, most often using new technology that wasn't available at the time of the original recording. In this particular context I think she means nothing will be changed. It will be mastered to sound like a retail release though.