Remove "I AM NOT DONE" and the verify mode and add AppState

exercises/22_clippy/clippy1.rs

@@ -9,8 +9,6 @@
 // Execute `rustlings hint clippy1` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
-
 use std::f32;
 
 fn main() {

exercises/22_clippy/clippy2.rs

@@ -3,8 +3,6 @@
 // Execute `rustlings hint clippy2` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
-
 fn main() {
     let mut res = 42;
     let option = Some(12);

exercises/22_clippy/clippy3.rs

@@ -3,8 +3,6 @@
 // Here's a couple more easy Clippy fixes, so you can see its utility.
 // No hints.
 
-// I AM NOT DONE
-
 #[allow(unused_variables, unused_assignments)]
 fn main() {
     let my_option: Option<()> = None;