Clean up and unify exercises

exercises/11_hashmaps/hashmaps1.rs

@@ -1,5 +1,3 @@
-// hashmaps1.rs
-//
 // A basket of fruits in the form of a hash map needs to be defined. The key
 // represents the name of the fruit and the value represents how many of that
 // particular fruit is in the basket. You have to put at least three different
@@ -7,9 +5,6 @@
 // of all the fruits should be at least five.
 //
 // Make me compile and pass the tests!
-//
-// Execute `rustlings hint hashmaps1` or use the `hint` watch subcommand for a
-// hint.
 
 use std::collections::HashMap;
 

exercises/11_hashmaps/hashmaps2.rs

@@ -1,5 +1,3 @@
-// hashmaps2.rs
-//
 // We're collecting different fruits to bake a delicious fruit cake. For this,
 // we have a basket, which we'll represent in the form of a hash map. The key
 // represents the name of each fruit we collect and the value represents how
@@ -10,9 +8,6 @@
 // to insert any more of these fruits!
 //
 // Make me pass the tests!
-//
-// Execute `rustlings hint hashmaps2` or use the `hint` watch subcommand for a
-// hint.
 
 use std::collections::HashMap;
 

exercises/11_hashmaps/hashmaps3.rs

@@ -1,5 +1,3 @@
-// hashmaps3.rs
-//
 // A list of scores (one per line) of a soccer match is given. Each line is of
 // the form : "<team_1_name>,<team_2_name>,<team_1_goals>,<team_2_goals>"
 // Example: England,France,4,2 (England scored 4 goals, France 2).
@@ -11,9 +9,6 @@
 // complete it to pass the test.
 //
 // Make me pass the tests!
-//
-// Execute `rustlings hint hashmaps3` or use the `hint` watch subcommand for a
-// hint.
 
 use std::collections::HashMap;