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

exercises/01_variables/variables1.rs

@@ -5,8 +5,6 @@
 // Execute `rustlings hint variables1` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
-
 fn main() {
     x = 5;
     println!("x has the value {}", x);

exercises/01_variables/variables2.rs

@@ -3,8 +3,6 @@
 // Execute `rustlings hint variables2` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
-
 fn main() {
     let x;
     if x == 10 {

exercises/01_variables/variables3.rs

@@ -3,8 +3,6 @@
 // Execute `rustlings hint variables3` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
-
 fn main() {
     let x: i32;
     println!("Number {}", x);

exercises/01_variables/variables4.rs

@@ -3,8 +3,6 @@
 // Execute `rustlings hint variables4` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
-
 fn main() {
     let x = 3;
     println!("Number {}", x);

exercises/01_variables/variables5.rs

@@ -3,8 +3,6 @@
 // Execute `rustlings hint variables5` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
-
 fn main() {
     let number = "T-H-R-E-E"; // don't change this line
     println!("Spell a Number : {}", number);

exercises/01_variables/variables6.rs

@@ -3,8 +3,6 @@
 // Execute `rustlings hint variables6` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
-
 const NUMBER = 3;
 fn main() {
     println!("Number {}", NUMBER);