Remove unneeded pub

exercises/quizzes/quiz2.rs

@@ -16,7 +16,7 @@
 //   the first element is the string, the second one is the command.
 // - The output element is going to be a Vector of strings.
 
-pub enum Command {
+enum Command {
     Uppercase,
     Trim,
     Append(usize),

exercises/quizzes/quiz3.rs

@@ -12,14 +12,14 @@
 // to support alphabetical report cards. Change the Grade in the second test to
 // "A+" to show that your changes allow alphabetical grades.
 
-pub struct ReportCard {
-    pub grade: f32,
-    pub student_name: String,
-    pub student_age: u8,
+struct ReportCard {
+    grade: f32,
+    student_name: String,
+    student_age: u8,
 }
 
 impl ReportCard {
-    pub fn print(&self) -> String {
+    fn print(&self) -> String {
         format!(
             "{} ({}) - achieved a grade of {}",
             &self.student_name, &self.student_age, &self.grade