wip: checkpoint multi-game core work

src/services/card_db.rs

@@ -42,17 +42,6 @@ impl CardDb {
         self.cards.get(id)
     }
 
-    #[allow(dead_code)]
-    pub fn by_rarity(&self, rarity: &str) -> Vec<&CardDefinition> {
-        self.cards
-            .values()
-            .filter(|c| {
-                let r = format!("{:?}", c.rarity).to_lowercase();
-                r == rarity || rarity == "any"
-            })
-            .collect()
-    }
-
     pub fn all(&self) -> Vec<&CardDefinition> {
         self.cards.values().collect()
     }