Remove @data from stdlib and compiler

core/builtins/src/kotlin/Annotations.kt

@@ -20,16 +20,6 @@ import kotlin.annotation.AnnotationRetention.BINARY
 import kotlin.annotation.AnnotationRetention.SOURCE
 import kotlin.annotation.AnnotationTarget.*
 
-/**
- * Marks the annotated class as a data class. The compiler automatically generates
- * equals()/hashCode(), toString(), componentN() and copy() functions for data classes.
- * See [the Kotlin language documentation](http://kotlinlang.org/docs/reference/data-classes.html)
- * for more information.
- */
-@Target(CLASS)
-@MustBeDocumented
-private annotation class data
-
 /**
  * Marks the annotated class, function, property, variable or parameter as deprecated.
  * @property message the message explaining the deprecation and recommending an alternative API to use.

core/descriptors/src/org/jetbrains/kotlin/builtins/KotlinBuiltIns.java

@@ -138,7 +138,6 @@ public abstract class KotlinBuiltIns {
 
         public final FqName throwable = fqName("Throwable");
 
-        public final FqName data = fqName("data");
         public final FqName deprecated = fqName("Deprecated");
         public final FqName tailRecursive = fqName("tailrec");
         public final FqName inline = fqName("inline");
@@ -1029,10 +1028,6 @@ public abstract class KotlinBuiltIns {
         return FQ_NAMES.cloneable.equals(getFqName(descriptor));
     }
 
-    public static boolean isData(@NotNull ClassDescriptor classDescriptor) {
-        return containsAnnotation(classDescriptor, FQ_NAMES.data);
-    }
-
     public static boolean isDeprecated(@NotNull DeclarationDescriptor declarationDescriptor) {
         return containsAnnotation(declarationDescriptor, FQ_NAMES.deprecated);
     }

core/descriptors/src/org/jetbrains/kotlin/descriptors/annotations/annotationUtil.kt

@@ -28,7 +28,7 @@ import org.jetbrains.kotlin.types.Variance
 
 // Please synchronize this set with JetTokens.ANNOTATION_MODIFIERS_KEYWORDS_ARRAY
 public val ANNOTATION_MODIFIERS_FQ_NAMES: Set<FqName> =
-        arrayOf("data", "inline", "noinline", "tailrec", "external", "annotation.annotation", "crossinline").map { FqName("kotlin.$it") }.toSet()
+        arrayOf("inline", "noinline", "tailrec", "external", "annotation.annotation", "crossinline").map { FqName("kotlin.$it") }.toSet()
 
 public fun KotlinBuiltIns.createDeprecatedAnnotation(message: String, replaceWith: String): AnnotationDescriptor {
     val deprecatedAnnotation = deprecatedAnnotation