Added method to clear specific player's kill attempts

src/main/java/net/fretux/knockedback/MobKillHandler.java

@@ -102,8 +102,6 @@ public class MobKillHandler {
             }
             updated.put(knockedId, attempt);
         }
-
-        // 5) Replace the map
         killAttempts.clear();
         killAttempts.putAll(updated);
     }
@@ -150,4 +148,8 @@ public class MobKillHandler {
         var srv = net.minecraftforge.server.ServerLifecycleHooks.getCurrentServer();
         return srv != null ? srv.getPlayerList().getPlayer(id) : null;
     }
+
+    public static void clearKillAttempt(UUID playerUuid) {
+        killAttempts.remove(playerUuid);
+    }
 }