JS: fix removal of unused lambdas after inlining

js/js.translator/testData/box/inlineSizeReduction/inlineLambdaCleanup.kt

@@ -0,0 +1,7 @@
+// CHECK_NOT_CALLED: produceOK except=box
+
+fun produceOK() = "OK"
+
+private inline fun <T> block(f: () -> T) = f()
+
+fun box(): String = block { produceOK() }