Prohibit body for annotation class

#KT-1886 Fixed

libraries/sandbox/extensionTraits/src/kotlin2/BindExtensionFunctions.kt

@@ -5,8 +5,7 @@ import jet.runtime.ArrayIterator
 /**
  * Annotates a class used to implement extension functions
  */
-annotation class extension() {
-}
+annotation class extension() 
 
 /**
  * Defines the extension functions on a List<T>

libraries/stdlib/src/js/Annotations.kt

@@ -4,10 +4,10 @@ package js
  * This annotation marks code as being a native JavaScript expression
  */
 native
-annotation class native(name : String = "") {}
+annotation class native(name : String = "")
 
 /**
  * Represents a function in the standard library
  */
 native
-annotation class library(name : String = "") {}
+annotation class library(name : String = "")