Revert "Rat Trap" (#73539)

Reverts tgstation/tgstation#73159

Pretty sure this wasn't supposed to be merged, considering it disabled a
test, a workflow run, and implements an atom New override

code/modules/mob/living/basic/vermin/mouse.dm

@@ -27,7 +27,6 @@
 	response_harm_simple = "splat"
 
 	ai_controller = /datum/ai_controller/basic_controller/mouse
-	var/canon_tag
 
 	/// Whether this rat is friendly to players
 	var/tame = FALSE
@@ -38,10 +37,6 @@
 	/// Probability that, if we successfully bite a shocked cable, that we will die to it.
 	var/cable_zap_prob = 85
 
-/mob/living/basic/mouse/New()
-	. = ..()
-	canon_tag = tag
-
 /mob/living/basic/mouse/Initialize(mapload, tame = FALSE)
 	. = ..()
 	if(contributes_to_ratcap)

code/modules/unit_tests/_unit_tests.dm

@@ -89,6 +89,7 @@
 #include "blindness.dm"
 #include "bloody_footprints.dm"
 #include "breath.dm"
+#include "cable_powernets.dm"
 #include "card_mismatch.dm"
 #include "cardboard_cutouts.dm"
 #include "chain_pull_through_space.dm"