IR: minor, move accept from IrConstantObjectImpl to IrConstantObject

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/expressions/IrConstantObject.kt

@@ -16,6 +16,9 @@ abstract class IrConstantObject : IrConstantValue() {
     abstract val valueArguments: MutableList<IrConstantValue>
     abstract val typeArguments: List<IrType>
 
+    override fun <R, D> accept(visitor: IrElementVisitor<R, D>, data: D): R =
+        visitor.visitConstantObject(this, data)
+
     override fun <D> acceptChildren(visitor: IrElementVisitor<Unit, D>, data: D) {
         valueArguments.forEach { value -> value.accept(visitor, data) }
     }

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/expressions/impl/IrConstantObjectImpl.kt

@@ -9,7 +9,6 @@ import org.jetbrains.kotlin.ir.expressions.*
 import org.jetbrains.kotlin.ir.symbols.IrConstructorSymbol
 import org.jetbrains.kotlin.ir.types.IrType
 import org.jetbrains.kotlin.ir.util.constructedClassType
-import org.jetbrains.kotlin.ir.visitors.IrElementVisitor
 import org.jetbrains.kotlin.utils.SmartList
 
 class IrConstantPrimitiveImpl(
@@ -45,10 +44,6 @@ class IrConstantObjectImpl constructor(
 ) : IrConstantObject() {
     override val valueArguments = SmartList(initArguments)
 
-    override fun <R, D> accept(visitor: IrElementVisitor<R, D>, data: D): R {
-        return visitor.visitConstantObject(this, data)
-    }
-
     override fun contentEquals(other: IrConstantValue): Boolean =
         other is IrConstantObject &&
                 other.type == type &&