fix: Race condition NPE for timer overlay

src/main/java/com/wynntils/modules/utilities/overlays/hud/ConsumableTimerOverlay.java

@@ -83,13 +83,15 @@ public static void addDynamicTimer(String name, int initialTimeSeconds, boolean
      */
     public static void addStaticTimer(String prefix, String name, String displayedTime, boolean persistent) {
         // If a DynamicTimerContainer or StaticTimerContainer already exists, get rid of it
-        activeTimers.remove(findTimerContainer(name));
+        removeTimer(name);
 
         activeTimers.add(new StaticTimerContainer(prefix, name, displayedTime, persistent));
     }
 
     public static void removeTimer(String name) {
-        activeTimers.remove(findTimerContainer(name));
+        if (findTimerContainer(name) != null) {
+            activeTimers.remove(findTimerContainer(name));
+        }
     }
 
     @Override