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

exercises/10_modules/modules1.rs

@@ -3,8 +3,6 @@
 // Execute `rustlings hint modules1` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
-
 mod sausage_factory {
     // Don't let anybody outside of this module see this!
     fn get_secret_recipe() -> String {

exercises/10_modules/modules2.rs

@@ -7,8 +7,6 @@
 // Execute `rustlings hint modules2` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
-
 mod delicious_snacks {
     // TODO: Fix these use statements
     use self::fruits::PEAR as ???

exercises/10_modules/modules3.rs

@@ -8,8 +8,6 @@
 // Execute `rustlings hint modules3` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
-
 // TODO: Complete this use statement
 use ???