Remove unnecessary constraints

See merge request !3

* gnurobbo-data: Drop conflict with removed package gnurobbo (<< 0.68) in Replaces.
* gnurobbo-data: Drop conflict with removed package gnurobbo (<< 0.68) in Breaks.

Changes-By: deb-scrub-obsolete

Fix some issues reported by lintian

See merge request !1

Changes-By: lintian-brush
Fixes: lintian: out-of-date-standards-version
See-also: https://lintian.debian.org/tags/out-of-date-standards-version.html

Changes-By: lintian-brush
Fixes: lintian: homepage-field-uses-insecure-uri
See-also: https://lintian.debian.org/tags/homepage-field-uses-insecure-uri.html

Changes-By: lintian-brush
Fixes: lintian: out-of-date-copyright-format-uri
See-also: https://lintian.debian.org/tags/out-of-date-copyright-format-uri.html

Closes: #957292

Upstream version 0.68+dfsg