these are scripts which you have installed
i don't think that they are dangerous in any way, just that Norton cannot recognise them as scripts as they aren't professionally made, it instead sees them as potential viruses/malicious code and advises you to remove them
so just to reassure you, you don't have any viruses, those are just clean scripts which you have installed but are picked up by norton as dangerous (because it doesn't know what it's talking about
)