Remove sbt-version-policy

Author: julienrf

project/plugins.sbt

@@ -10,4 +10,3 @@ addSbtPlugin("org.portable-scala" % "sbt-scala-native-crossproject" % "1.1.0")
 addSbtPlugin("org.scala-js" % "sbt-scalajs" % scalaJSVersion)
 addSbtPlugin("org.scala-native" % "sbt-scala-native" % scalaNativeVersion)
 addSbtPlugin("de.heikoseeberger" % "sbt-header" % "5.6.0")
-addSbtPlugin("ch.epfl.scala" % "sbt-version-policy" % "1.2.1")