Merge pull request #7994 from xuwei-k/unused-build-file

[2.x] remove unused code in build files

build.sbt

@@ -1294,17 +1294,6 @@ lazy val javafmtOnCompile = taskKey[Unit]("Formats java sources before compile")
 lazy val scriptedProjects = ScopeFilter(inAnyProject)
 
 def customCommands: Seq[Setting[_]] = Seq(
-  commands += Command.command("setupBuildScala212") { state =>
-    s"""set scalaVersion in ThisBuild := "$scala212" """ ::
-      state
-  },
-  commands += Command.command("release-sbt-local") { state =>
-    "clean" ::
-      "so compile" ::
-      "so publishLocal" ::
-      "reload" ::
-      state
-  },
   commands += Command.command("publishLocalAllModule") { state =>
     val extracted = Project.extract(state)
     import extracted._

project/Check.scala

@@ -1,26 +0,0 @@
-import java.io.File
-import java.util.zip.ZipFile
-
-import scala.collection.JavaConverters._
-
-object Check {
-
-  def onlyNamespace(ns: String, jar: File, ignoreFiles: Set[String] = Set.empty): Unit = {
-    val zf = new ZipFile(jar)
-    val unrecognized = zf
-      .entries()
-      .asScala
-      .map(_.getName)
-      .filter { n =>
-        !n.startsWith("META-INF/") && !n.startsWith(ns + "/") &&
-        n != "reflect.properties" && // scala-reflect adds that
-        !ignoreFiles(n)
-      }
-      .toVector
-      .sorted
-    for (u <- unrecognized)
-      System.err.println(s"Unrecognized: $u")
-    assert(unrecognized.isEmpty)
-  }
-
-}

project/Dependencies.scala

@@ -1,10 +1,8 @@
 import sbt._
 import Keys._
-import sbt.contraband.ContrabandPlugin.autoImport._
 
 object Dependencies {
   // WARNING: Please Scala update versions in PluginCross.scala too
-  val scala212 = "2.12.20"
   val scala213 = "2.13.15"
   val scala3 = "3.6.2"
   val checkPluginCross = settingKey[Unit]("Make sure scalaVersion match up")

project/PublishBinPlugin.scala

@@ -1,11 +1,9 @@
 package sbt
 
-import java.nio.charset.StandardCharsets.UTF_8
 import java.nio.file.{ FileAlreadyExistsException, Files }
 
-import org.apache.ivy.core.module.id.ModuleRevisionId
 import sbt.Keys._
-import sbt.internal.librarymanagement.{ IvySbt, IvyXml }
+import sbt.internal.librarymanagement.IvyXml
 
 /** This local plugin provides ways of publishing just the binary jar. */
 object PublishBinPlugin extends AutoPlugin {