Merge pull request scala/scala#9788 from SethTisue/deprecation-cleanup

clean up deprecation warning suppression

Author: lrytz

library/src/scala/runtime/ModuleSerializationProxy.scala

@@ -19,12 +19,12 @@ import scala.annotation.nowarn
 
 private[runtime] object ModuleSerializationProxy {
  private val instances = new ClassValueCompat[Object] {
- @deprecated("", "") // because AccessController is deprecated on JDK 17
+ @nowarn("cat=deprecation") // AccessController is deprecated on JDK 17
  def getModule(cls: Class[_]): Object =
  java.security.AccessController.doPrivileged(
  (() => cls.getField("MODULE$").get(null)): PrivilegedExceptionAction[Object])
  override protected def computeValue(cls: Class[_]): Object =
- try getModule(cls): @nowarn("cat=deprecation")
+ try getModule(cls)
  catch {
  case e: PrivilegedActionException =>
  rethrowRuntime(e.getCause)