Safe Delete: Move test classes and test data to refactoring directory

idea/testData/refactoring/safeDelete/deleteValueParameter/kotlinValueParameterWithJava/lambdaArg.kt

@@ -0,0 +1,9 @@
+package test
+
+fun foo(n: Int, <caret>f: (Int) -> Unit) {
+    println(n)
+}
+
+fun bar() {
+    foo(10) { n -> println(n) }
+}