Migrate testdata to new lambda syntax

js/js.translator/testData/expression/invoke/cases/invokeInFunctionLiteral.kt

@@ -1,9 +1,9 @@
 package foo
 
 fun box(): Boolean {
-    val v1 = {(x: Int) -> x}(2)
+    val v1 = { x: Int -> x}(2)
 
-    val f = {(x: Int) -> x}
+    val f = { x: Int -> x}
     val v2 = (f)(2)
 
     return v1 == 2 && v2 == 2