Mission Impact has legacy option None still in the CSV files of child_trees.

[sei-vsarvepalli]

Describe the bug It looks like there is some legacy notation of "none" for Mission Impact (v1.0.0) still in the child_trees. This option was eliminated in the Mission Impact (V2.0.0). https://github.com/CERTCC/SSVC/blob/main/data/csvs/child_trees/human-impact.csv

To Reproduce Steps to reproduce the behavior: The file in https://github.com/CERTCC/SSVC/blob/main/data/csvs/child_trees/human-impact.csv does not match the JSON schema provided for Human Impact https://github.com/CERTCC/SSVC/blob/main/data/json/decision_points/human_impact_2_0_0.json

Expected behavior The value None and label should not be present in the CSV files.

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Additional context N/A