Minor. Move Deprecation and DeprecationLevel interfaces to core

compiler/frontend/src/org/jetbrains/kotlin/resolve/deprecationUtil.kt

@@ -50,12 +50,6 @@ import org.jetbrains.kotlin.utils.addToStdlib.safeAs
 
 private val JAVA_DEPRECATED = FqName("java.lang.Deprecated")
 
-interface Deprecation {
-    val deprecationLevel: DeprecationLevelValue
-    val message: String?
-    val target: DeclarationDescriptor
-}
-
 fun Deprecation.deprecatedByOverriddenMessage(): String? = (this as? DeprecatedByOverridden)?.additionalMessage()
 
 fun Deprecation.deprecatedByAnnotationReplaceWithExpression(): String? {
@@ -214,11 +208,6 @@ internal fun createDeprecationDiagnostic(
     }
 }
 
-// values from kotlin.DeprecationLevel
-enum class DeprecationLevelValue {
-    WARNING, ERROR, HIDDEN
-}
-
 @DefaultImplementation(CoroutineCompatibilitySupport::class)
 class CoroutineCompatibilitySupport private constructor(val enabled: Boolean) {
     constructor() : this(true)

core/descriptors/src/org/jetbrains/kotlin/resolve/deprecation.kt

@@ -0,0 +1,20 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.resolve
+
+import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
+
+interface Deprecation {
+    val deprecationLevel: DeprecationLevelValue
+    val message: String?
+    val target: DeclarationDescriptor
+}
+
+// values from kotlin.DeprecationLevel
+enum class DeprecationLevelValue {
+    WARNING, ERROR, HIDDEN
+}
+