Adjust build definition

- plugin sbt-version-policy is not needed anymore, it is brought by sbt-scala-module
- key `versionScheme` is already configured by sbt-version-policy
- key `scalaModuleMimaPreviousVersion` is not needed anymore
- `versionPolicyCheck` does not need to be invoked explicitly, because the task `test` of published modules already depends on it

Author: julienrf

build.sbt

@@ -75,13 +75,11 @@ lazy val compat = MultiScalaCrossProject(JSPlatform, JVMPlatform, NativePlatform
             sharedSourceDir / "scala-2.11_2.12"
         }
       },
-      versionScheme := Some("early-semver"),
       versionPolicyIntention := Compatibility.BinaryCompatible,
     )
     .jvmSettings(
       Test / unmanagedSourceDirectories += (ThisBuild / baseDirectory).value / "compat/src/test/scala-jvm",
       junit,
-      scalaModuleMimaPreviousVersion := Some("2.5.0"),
       mimaBinaryIssueFilters ++= {
         import com.typesafe.tools.mima.core._
         import com.typesafe.tools.mima.core.ProblemFilters._
@@ -373,7 +371,6 @@ inThisBuild(
             List(s"""++${sys.env.get("TRAVIS_SCALA_VERSION").get}!"""),
             List(s"$projectPrefix/clean"),
             List(s"$testProjectPrefix/test"),
-            List(s"$projectPrefix/versionPolicyCheck"),
             List(s"$projectPrefix/publishLocal"),
             publishTask
           ).flatten

project/plugins.sbt

@@ -11,4 +11,3 @@ addSbtPlugin("org.portable-scala"     % "sbt-scala-native-crossproject" % crossV
 addSbtPlugin("org.scala-lang.modules" % "sbt-scala-module"              % "2.4.0")
 addSbtPlugin("ch.epfl.scala"          % "sbt-scalafix"                  % "0.9.29")
 addSbtPlugin("com.eed3si9n"           % "sbt-buildinfo"                 % "0.10.0")
-addSbtPlugin("ch.epfl.scala"          % "sbt-version-policy"            % "1.2.1")