Fix #104, Removal of HS6013, HS6014, and HS6015

[dmknutsen]

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• I reviewed the Contributing Guide.
• I signed and emailed the appropriate Contributor License Agreement to GSFC-SoftwareRelease@mail.nasa.gov and copied cfs-program@lists.nasa.gov.

Describe the contribution
Removes HS6013, HS6014, and HS6015 from hs_FunctionalRequirements.csv.
Fixes #104

Contributor Info - All information REQUIRED for consideration of pull request
Full name and company/organization/center of all contributors ("Personal" if individual work)
Dan Knutsen
NASA Goddard