Removing the seam isn’t the problem so much as re-stitching it in a manner that will hold. Most people don’t own sergers - even if they sew. I’ve been sewing for nearly 30 years and I only bought one for myself last year.
A serger trims off the excess material, so that the edges of the fabric are enclosed. If you sew a straight stitch along that same seam line, you’ll have maybe 1/4" of fabric sticking out past your stitching. The standard seam allowance for a straight stitch is 5/8".
Basically a straight stitch is probably not the best way to do this. Machines with multiple stitches will usually have a zigzag or some sort of faux-overlock that would be a better choice.
