Remove potentially buggy unused methods

project/Util.scala

@@ -2,8 +2,6 @@ import scala.util.control.NonFatal
 import sbt._
 import Keys._
 
-import sbt.internal.inc.Analysis
-
 object Util {
   val version2_13 = settingKey[String]("version number")
   val ExclusiveTest: Tags.Tag = Tags.Tag("exclusive-test")
@@ -75,30 +73,6 @@ object Util {
     run.run(mainClass, cp.files, args, s.log).failed foreach (e => sys error e.getMessage)
     (out ** "*.java").get
   }
-  def lastCompilationTime(analysis: Analysis): Long = {
-    val lastCompilation = analysis.compilations.allCompilations.lastOption
-    lastCompilation.map(_.getStartTime) getOrElse 0L
-  }
-  def generateVersionFile(
-      version: String,
-      dir: File,
-      s: TaskStreams,
-      analysis: Analysis
-  ): Seq[File] = {
-    import java.util.{ Date, TimeZone }
-    val formatter = new java.text.SimpleDateFormat("yyyyMMdd'T'HHmmss")
-    formatter.setTimeZone(TimeZone.getTimeZone("GMT"))
-    val timestamp = formatter.format(new Date)
-    val content = versionLine(version) + "\ntimestamp=" + timestamp
-    val f = dir / "xsbt.version.properties"
-    // TODO: replace lastModified() with sbt.io.IO.getModifiedTimeOrZero(), once the build
-    // has been upgraded to a version of sbt that includes that call.
-    if (!f.exists || f.lastModified < lastCompilationTime(analysis) || !containsVersion(f, version)) {
-      s.log.info("Writing version information to " + f + " :\n" + content)
-      IO.write(f, content)
-    }
-    f :: Nil
-  }
   def versionLine(version: String): String = "version=" + version
   def containsVersion(propFile: File, version: String): Boolean =
     IO.read(propFile).contains(versionLine(version))