Delete kotlin.jvm.internal.KObject

It was supposed to be used in reflection but the benefits do not outweigh the
cost of KT-6951

 #KT-3223 Fixed
 #KT-6951 Fixed

core/descriptor.loader.java/src/org/jetbrains/kotlin/load/java/JvmAbi.java

@@ -17,7 +17,6 @@
 package org.jetbrains.kotlin.load.java;
 
 import org.jetbrains.annotations.NotNull;
-import org.jetbrains.kotlin.name.FqName;
 import org.jetbrains.kotlin.name.Name;
 
 public final class JvmAbi {
@@ -40,7 +39,6 @@ public final class JvmAbi {
 
     public static final String INSTANCE_FIELD = "INSTANCE$";
 
-    public static final FqName K_OBJECT = new FqName("kotlin.jvm.internal.KObject");
     public static final String KOTLIN_CLASS_FIELD_NAME = "$kotlinClass";
     public static final String KOTLIN_PACKAGE_FIELD_NAME = "$kotlinPackage";
 

core/runtime.jvm/src/kotlin/jvm/internal/KObject.java

@@ -1,20 +0,0 @@
-/*
- * Copyright 2010-2015 JetBrains s.r.o.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package kotlin.jvm.internal;
-
-public interface KObject {
-}