Fix Spigot annotation mistakes

while some of these may of been true, they are extreme cases and cause
a ton of noise to plugin developers.

Use ApiStatus.Internal instead of Deprecated for actual internal API
that continues to have use (internally).

These do not help plugin developers if they bring moise noise than value.

paper-api/src/main/java/org/bukkit/entity/LivingEntity.java

@@ -716,7 +716,9 @@ public interface LivingEntity extends Attributable, Damageable, ProjectileSource
      * This may have unexpected results if the entity is not in water.
      *
      * @param swimming True if the entity is swimming.
+     * @deprecated This does nothing and is immediately reverted by the server, in the next tick <!-- Paper - future note: should wait a mojang input client/server side -->
      */
+    @Deprecated // Paper
     public void setSwimming(boolean swimming);
 
     /**
@@ -981,7 +983,7 @@ public interface LivingEntity extends Attributable, Damageable, ProjectileSource
      * @deprecated entity groupings are now managed by tags, not categories
      */
     @NotNull
-    @Deprecated(since = "1.20.5")
+    @Deprecated(since = "1.20.5", forRemoval = true) @org.jetbrains.annotations.Contract("-> fail") // Paper
     public EntityCategory getCategory();
 
     /**