Remove explicit pom scm from build.sbt (bp #2004) (#2005)

* Remove explicit pom scm from build.sbt (#2004)

This is now set by sbt-ci-release

(cherry picked from commit 862aaec4

)

# Conflicts:
#	build.sbt

* Resolve conflicts

Co-authored-by: Jack Koenig <koenig@sifive.com>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>