Update nasa-heasarc.yaml

Author: cstner

datasets/nasa-heasarc.yaml

@@ -24,7 +24,6 @@ Tags:
   - imaging
   - satellite imagery
   - x-ray
-
 License: See [the HEASARC data policy web site](https://heasarc.gsfc.nasa.gov/docs/heasarc/data_policy.html)
 Citation: See [the HEASARC data policy web site](https://heasarc.gsfc.nasa.gov/docs/heasarc/data_policy.html)
 Resources: