Removes withdrawal effect messages from ambrosia extract (#20971)

Title, the way it works when smoking it constantly enters and exist the
bloodstream so you get chat spam every tick it feels like, saying "you
feel like garbage/head aches", which basically defeats the point of
actively smoking it.

code/modules/reagents/Chemistry-Reagents/Chemistry-Reagents-Drugs.dm

@@ -487,6 +487,7 @@
 	taste_mult = 0.4
 	fallback_specific_heat = 1.6
 	value = 2.8
+	effect_messages = FALSE
 	condiment_name = "Ambrosia Extract Bottle"
 	condiment_desc = "A small dropper bottle full of a stoner's paradise."
 	condiment_icon_state = "ambrosiaextract"