[PE-D][Tester C] No error when I try to delete tags that dont exist

[soc-se-bot]

using the default info as an example:

person 3 is David Li with one tag only: family

if i use delete tag -id 3 -t f to delete a tag f which does not exist i still a success message Successfully deleted tags: [f]

You should instead be displaying some sort of error to show that the tag does not exist

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Labels: type.FunctionalityBug severity.High
original: chuababyy/ped#4