How can i get-rid from all these line-types? there is anyhow nothing in the file!!!!! but they are not purging

i took a plugin from a file. from then all these line-types are there. so i deleted that plugin. but line-types are not gone. and anything i copied from these file there these line type added. what should i do? plz help if you can.i attached the screenshots of my actions to try to delete these linetypes.

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