Remove obsolete field Name from debian/upstream/metadata (already present in...

Remove obsolete field Name from debian/upstream/metadata (already present in machine-readable debian/copyright).

Changes-By: lintian-brush

debian/upstream/metadata

 ASCL-Id: 1208.001
 Bug-Database: https://github.com/dstndstn/astrometry.net/issues
-Name: astrometry.net
 Bug-Submit: https://github.com/dstndstn/astrometry.net/issues/new
 Reference:
  Author: Lang, D. and Hogg, D. W. and Mierle, K. and Blanton, M. and Roweis, S.