Merge boxWithJava testData into box, delete BoxWithJava test

compiler/testData/codegen/box/casts/literalExpressionAsGenericArgument/javaBox.kt

@@ -17,6 +17,7 @@ public class Box<T> {
 }
 
 // FILE: test.kt
+// See KT-10313: ClassCastException with Generics
 
 fun box(): String {
     val sub = Box<Long>(-1)

compiler/testData/codegen/box/classes/classCompanionInitializationWithJava.kt

@@ -1,3 +1,4 @@
+// TARGET_BACKEND: JVM
 // FILE: CompanionInitialization.java
 
 public class CompanionInitialization {

compiler/testData/codegen/box/classes/interfaceCompanionInitializationWithJava.kt

@@ -1,3 +1,4 @@
+// TARGET_BACKEND: JVM
 // WITH_RUNTIME
 // FILE: CompanionInitialization.java
 

compiler/testData/codegen/box/innerNested/innerGenericClassFromJava.kt

@@ -1,3 +1,4 @@
+// TARGET_BACKEND: JVM
 // FILE: JavaClass.java
 
 public abstract class JavaClass {

compiler/testData/codegen/box/innerNested/innerJavaClass.kt

@@ -1,3 +1,4 @@
+// TARGET_BACKEND: JVM
 // FILE: JavaClass.java
 
 public abstract class JavaClass {

compiler/testData/codegen/box/secondaryConstructors/withGenerics.kt

@@ -1,3 +1,4 @@
+// TARGET_BACKEND: JVM
 // FILE: WithGenerics.java
 
 class WithGenerics {

compiler/testData/codegen/box/secondaryConstructors/withPrimary.kt

@@ -1,3 +1,4 @@
+// TARGET_BACKEND: JVM
 // FILE: WithPrimary.java
 
 class WithPrimary {

compiler/testData/codegen/box/secondaryConstructors/withVarargs.kt

@@ -1,3 +1,4 @@
+// TARGET_BACKEND: JVM
 // FILE: WithVarargs.java
 
 public class WithVarargs {

compiler/testData/codegen/box/secondaryConstructors/withoutPrimary.kt

@@ -1,3 +1,4 @@
+// TARGET_BACKEND: JVM
 // FILE: WithoutPrimary.java
 
 class WithoutPrimary {