The formatting that you see in the file is the format that Audacity uses to create and keep track of labels. There is no provision within Audacity for other label formats.
You can probably reformat the file uses Excel or similar. Note that if you reformat the label file then you won’t be able to import the file back into Audacity.
If you create labels without any text in the labels, then they will be exported in the form:
If you have a text editor that allow string replacement (string substitution) then you should be able to automatically remove all of the “New Line” characters to give you: