Remove unused import

src/lang.rs

@@ -1,5 +1,3 @@
-use rand::RngExt;
-
 #[derive(Clone, Debug)]
 pub struct KanaSet {
     name: String,
@@ -179,13 +177,13 @@ impl KanaSet {
         }
     }
 
-    pub fn next(&mut self) -> (String, String) {
+/*    pub fn next(&mut self) -> (String, String) {
         let current_set = self.list();
 
         let mut rand = rand::rng();
         let index: u32 = rand.random();
         current_set[index as usize % current_set.len()].clone()
-    }
+    }*/
 
     pub fn list(&self) -> Vec<(String, String)> {
         let mut current_set: Vec<(String, String)> = Vec::new();