Remove js classes that should not be there

compiler/testData/codegen/box/classes/kt1157.kt

@@ -11,6 +11,10 @@ public object SomeClass {
     public fun run(): Unit = work.run()
 }
 
+interface Runnable {
+    fun run(): Unit
+}
+
 fun box(): String {
     SomeClass.run()
     return "OK"

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

@@ -28,4 +28,8 @@ class C {
     }
 }
 
+interface Runnable {
+    fun run(): Unit
+}
+
 fun box() = C().foo()

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

@@ -24,4 +24,8 @@ class C{
     }
 }
 
+interface Runnable {
+    fun run(): Unit
+}
+
 fun box() = if (C().foo() == 3) "OK" else "NOT OK"