nate i assume when you use \ in a regex that means to look for the leading character instead of it being used as part of the formatting? if so i think that makes it so it finally makes sense to me.
I find that Notepad++ works great for removing junk lines in the text.
go to search > find
search for a term that appears in the lines you want to remove.
check mark line, hit find all.
go to search > delete bookmarked lines