Create From Usage: Generate Unit-typed declaration if result is unused

#KT-5903 Fixed

idea/testData/quickfix/createFromUsage/createFunction/call/afterUnitFun.kt

@@ -0,0 +1,9 @@
+// "Create function 'foo' from usage" "true"
+
+fun test() {
+    foo(2, "2")
+}
+
+fun foo(i: Int, s: String) {
+    throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
+}