Removes an unused variable from code (#5844)

# About the pull request
Removes "ignore_slots" from hive status, as far as I can tell it doesn't
do anything? nowhere else is it mentioned in the code, and the gitlab
archive is the same.


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# Explain why it's good for the game
useless vars... bad?
# Testing Photographs and Procedure
<details>
<summary>Testing </summary>

it compiled.

</details>


# Changelog
no player facing changes

code/modules/mob/living/carbon/xenomorph/hive_status.dm

@@ -53,7 +53,6 @@
 	/// how many burrowed is going to spawn during larva surge
 	var/hijack_burrowed_left = 0
 
-	var/ignore_slots = FALSE
 	var/dynamic_evolution = TRUE
 	var/evolution_rate = 3 // Only has use if dynamic_evolution is false
 	var/evolution_bonus = 0
@@ -1052,7 +1051,6 @@
 	allow_no_queen_actions = TRUE
 	allow_no_queen_evo = TRUE
 	allow_queen_evolve = FALSE
-	ignore_slots = TRUE
 	latejoin_burrowed = FALSE
 
 /datum/hive_status/forsaken
@@ -1067,7 +1065,6 @@
 	allow_no_queen_actions = TRUE
 	allow_no_queen_evo = TRUE
 	allow_queen_evolve = FALSE
-	ignore_slots = TRUE
 	latejoin_burrowed = FALSE
 
 	need_round_end_check = TRUE
@@ -1108,7 +1105,6 @@
 	allow_no_queen_actions = TRUE
 	allow_no_queen_evo = TRUE
 	allow_queen_evolve = FALSE
-	ignore_slots = TRUE
 	latejoin_burrowed = FALSE
 
 	need_round_end_check = TRUE
@@ -1138,7 +1134,6 @@
 	allow_no_queen_actions = TRUE
 	allow_no_queen_evo = TRUE
 	allow_queen_evolve = FALSE
-	ignore_slots = TRUE
 	latejoin_burrowed = FALSE
 
 	var/mob/living/carbon/human/leader