Removes now-unnecessary obj_integrity definitions

code/modules/recycling/disposal-construction.dm

@@ -11,7 +11,6 @@
 	density = 0
 	pressure_resistance = 5*ONE_ATMOSPHERE
 	level = 2
-	obj_integrity = 200
 	max_integrity = 200
 	var/ptype = 0
 

code/modules/recycling/disposal-structures.dm

@@ -139,7 +139,6 @@
 	level = 1			// underfloor only
 	var/dpdir = 0		// bitmask of pipe directions
 	dir = 0// dir will contain dominant direction for junction pipes
-	obj_integrity = 200
 	max_integrity = 200
 	armor = list(melee = 25, bullet = 10, laser = 10, energy = 100, bomb = 0, bio = 100, rad = 100, fire = 90, acid = 30)
 	layer = DISPOSAL_PIPE_LAYER			// slightly lower than wires and other pipes

code/modules/recycling/disposal-unit.dm

@@ -9,7 +9,6 @@
 	density = 1
 	on_blueprints = TRUE
 	armor = list(melee = 25, bullet = 10, laser = 10, energy = 100, bomb = 0, bio = 100, rad = 100, fire = 90, acid = 30)
-	obj_integrity = 200
 	max_integrity = 200
 	resistance_flags = FIRE_PROOF
 	interact_open = TRUE