[JS IR] JS code in init block only for js ir backend test

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/semantics/BoxJsTestGenerated.java

@@ -5120,11 +5120,6 @@ public class BoxJsTestGenerated extends AbstractBoxJsTest {
             runTest("js/js.translator/testData/box/jsCode/if.kt");
         }
 
-        @TestMetadata("init.kt")
-        public void testInit() throws Exception {
-            runTest("js/js.translator/testData/box/jsCode/init.kt");
-        }
-
         @TestMetadata("invocation.kt")
         public void testInvocation() throws Exception {
             runTest("js/js.translator/testData/box/jsCode/invocation.kt");

js/js.translator/testData/box/jsCode/init.kt

@@ -1,4 +1,5 @@
-// EXPECTED_REACHABLE_NODES: 1282
+// TARGET_BACKEND: JS_IR
+
 package foo
 
 class A {