I'm trying to figure out how to adjust/remove the top edge flanges to remove the little bends in the corner but I can't figure out how...

I also tried doing a relief but it doesn't apply to it?

Note: I've tried searching everywhere for this topic but no luck :/ Also I'm fairly new to using Solidworks so if theres a different approach I'm missing, please let me know! Thanks a bunch!

Edit: Uploaded Proper File...