Deprecate Synchronized annotation in common and JS #KT-55344

libraries/stdlib/api/js-v1/kotlin.jvm.kt

@@ -1,5 +1,7 @@
 @kotlin.annotation.Target(allowedTargets = {AnnotationTarget.FUNCTION, AnnotationTarget.PROPERTY_GETTER, AnnotationTarget.PROPERTY_SETTER})
 @kotlin.annotation.Retention(value = AnnotationRetention.SOURCE)
+@kotlin.Deprecated(message = "Synchronizing methods on a class instance is not supported on platforms other than JVM. If you need to annotate a common method as JVM-synchronized, introduce your own optional-expectation annotation and actualize it with a typealias to kotlin.jvm.Synchronized.")
+@kotlin.DeprecatedSinceKotlin(warningSince = "1.8")
 public final annotation class Synchronized : kotlin.Annotation {
     public constructor Synchronized()
 }

libraries/stdlib/api/js/kotlin.jvm.kt

@@ -1,5 +1,7 @@
 @kotlin.annotation.Target(allowedTargets = {AnnotationTarget.FUNCTION, AnnotationTarget.PROPERTY_GETTER, AnnotationTarget.PROPERTY_SETTER})
 @kotlin.annotation.Retention(value = AnnotationRetention.SOURCE)
+@kotlin.Deprecated(message = "Synchronizing methods on a class instance is not supported on platforms other than JVM. If you need to annotate a common method as JVM-synchronized, introduce your own optional-expectation annotation and actualize it with a typealias to kotlin.jvm.Synchronized.")
+@kotlin.DeprecatedSinceKotlin(warningSince = "1.8")
 public final annotation class Synchronized : kotlin.Annotation {
     public constructor Synchronized()
 }

libraries/stdlib/common/src/kotlin/JvmAnnotationsH.kt

@@ -160,6 +160,8 @@ public expect annotation class Strictfp()
 @Target(FUNCTION, PROPERTY_GETTER, PROPERTY_SETTER)
 @MustBeDocumented
 @OptionalExpectation
+@Deprecated("Synchronizing methods on a class instance is not supported on platforms other than JVM. If you need to annotate a common method as JVM-synchronized, introduce your own optional-expectation annotation and actualize it with a typealias to kotlin.jvm.Synchronized.")
+@DeprecatedSinceKotlin(warningSince = "1.8")
 public expect annotation class Synchronized()
 
 

libraries/stdlib/js/src/kotlin/annotationsJVM.kt

@@ -15,4 +15,6 @@ public actual annotation class Volatile
 
 @Target(AnnotationTarget.FUNCTION, AnnotationTarget.PROPERTY_GETTER, AnnotationTarget.PROPERTY_SETTER)
 @Retention(AnnotationRetention.SOURCE)
+@Deprecated("Synchronizing methods on a class instance is not supported on platforms other than JVM. If you need to annotate a common method as JVM-synchronized, introduce your own optional-expectation annotation and actualize it with a typealias to kotlin.jvm.Synchronized.")
+@DeprecatedSinceKotlin(warningSince = "1.8")
 public actual annotation class Synchronized