Deprecation cleanup.

By: Erik Broes <erikbroes@grum.nl>

paper-api/src/main/java/org/bukkit/Achievement.java

@@ -47,20 +47,6 @@ public enum Achievement {
         return id;
     }
 
-    /**
-     * Gets the achievement associated with the given ID.
-     * <p />
-     * Note that the ID must already be offset using {@link #STATISTIC_OFFSET}
-     *
-     * @param id ID of the achievement to return
-     * @return Achievement with the given ID
-     * @deprecated use {@link Achievement#getById(int)}
-     */
-    @Deprecated
-    public static Achievement getAchievement(int id) {
-        return BY_ID.get(id);
-    }
-
     /**
      * Gets the achievement associated with the given ID.
      * <p />