Remove scm and dependency-info reports (Doxia 1.11.x incompatibility)

Remove scm and dependency-info reports (Doxia 1.11.x incompatibility)

Both reports fail at runtime with NoSuchMethodError: Sink.verbatim()
because maven-project-info-reports-plugin 3.7.0 uses an older
maven-reporting-impl that calls the no-arg verbatim() variant, which
was removed in Doxia 1.11.x (shipped with maven-site-plugin 3.12.1).

The information covered by these reports (SCM URLs, Maven coordinates)
is already documented in index.md and visible in the POM.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>