remove inadvertent metadata

Author: MaxGhenis

openfisca_us/parameters/openfisca/completed_programs/state.yaml

@@ -160,10 +160,5 @@ WV:
 WY:
   2021-01-01:
     - SNAP
-
-  metadata:
-    reference:
-      - title: Schedule NTS-L-NR/PY No Tax Status and Limited Income Credit 2021 (line 16)
-        href: https://www.mass.gov/doc/2021-schedule-nts-l-nrpy-no-tax-status-and-limited-income-credit/download
 metadata:
   breakdown: state_code