upgrade to 3.4.0 stable

Author: bishabosha

project/DottySupport.scala

@@ -12,7 +12,7 @@ import sbt.librarymanagement.{
   * Settings to support validation of TastyUnpickler against the release of dotty with the matching TASTy version
   */
 object TastySupport {
-  val supportedTASTyRelease = "3.4.0-RC4" // TASTY: 28.4-experimental-1 (preparing for final release 28.4)
+  val supportedTASTyRelease = "3.4.0" // TASTY: 28.4-0
   val scala3Compiler = "org.scala-lang" % "scala3-compiler_3" % supportedTASTyRelease
   val scala3Library = "org.scala-lang" % "scala3-library_3" % supportedTASTyRelease
 

src/compiler/scala/tools/nsc/tasty/TastyUnpickler.scala

@@ -71,7 +71,7 @@ object TastyUnpickler {
     /** When Scala 3 is in an RC phase for a new minor version, we put here the TASTy of that Minor,
      * otherwise it should be empty.
      */
-    final val toolOverrides: List[TastyVersion] = List(TastyVersion(28, 4, 1) /* 3.4.0-RC4 */)
+    final val toolOverrides: List[TastyVersion] = Nil
 
     private def asScala3Compiler(version: TastyVersion): String =
       if (version.major == 28) {