Drop package facades: JVM BE tests passed.

compiler/testData/codegen/boxWithJava/builtinStubMethods/substitutedIterable/Test.java

@@ -1,7 +1,7 @@
 public class Test {
     public static void checkCallFromJava() {
         try {
-            String x = _DefaultPackage.foo().iterator().next();
+            String x = SubstitutedIterableKt.foo().iterator().next();
             throw new AssertionError("E should have been thrown");
         } catch (E e) { }
     }

compiler/testData/codegen/boxWithJava/fileClasses/withPackageFacade/Baz.java

@@ -1,7 +0,0 @@
-import test.TestPackage;
-
-public class Baz {
-    public static String baz() {
-        return TestPackage.foo() + TestPackage.bar();
-    }
-}

compiler/testData/codegen/boxWithJava/fileClasses/withPackageFacade/bar.kt

@@ -1,5 +0,0 @@
-@file:JvmName("Util")
-@file:JvmMultifileClass
-package test
-
-public fun bar(): String = "K"

compiler/testData/codegen/boxWithJava/fileClasses/withPackageFacade/foo.kt

@@ -1,4 +0,0 @@
-@file:[JvmName("Util") JvmMultifileClass]
-package test
-
-public fun foo(): String = "O"

compiler/testData/codegen/boxWithJava/fileClasses/withPackageFacade/withPackageFacade.kt

@@ -1,5 +0,0 @@
-package test
-
-import Baz
-
-fun box(): String = Baz.baz()

compiler/testData/codegen/boxWithJava/notNullAssertions/extensionReceiverParameter/Test.java

@@ -1,11 +1,11 @@
 public class Test {
     public static String invokeFoo() {
         try {
-            _DefaultPackage.foo(null);
+            ExtensionKt.foo(null);
         }
         catch (IllegalArgumentException e) {
             try {
-                _DefaultPackage.getBar(null);
+                ExtensionKt.getBar(null);
             }
             catch (IllegalArgumentException f) {
                 return "OK";