Scripts/Quests: Fix Red Snapper - Very Tasty! GOb

Fix 'School of Red Snapper' now disappear correctly when using 'Draenei Fishing Net', the bug is caused because the GameObject is SpellFocus type.

Fix: #1673
No, I didn't see that there was a condition, but I corrected it, so I deleted the comment xD

However using the script into the existing condition the OnConditionCheck stops working when the gameobject enters in 'respawn'.