First nerf of Cryo goonpower + Dionea nerf

Worked with Neca, he wanted some things changed, Nerfed dionea's
regeneration by removing their ability to regenerate from toxin damage,
making plant-b-gone even more effective.

Cryokinesis was nerfed due to its ability to ensure death to anyone who
does not have access to medical treatment.

code/modules/mob/living/carbon/human/life.dm

@@ -957,7 +957,6 @@
 					nutrition = 500
 				if(light_amount >= 5) //if there's enough light, heal
 					adjustBruteLoss(-(light_amount))
-					adjustToxLoss(-(light_amount))
 					adjustOxyLoss(-(light_amount))
 					//TODO: heal wounds, heal broken limbs.