513 Compatability

code/_helpers/unsorted.dm

@@ -587,10 +587,6 @@ Turf and target are seperate in case you want to teleport some distance from a t
 /proc/between(var/low, var/middle, var/high)
 	return max(min(middle, high), low)
 
-proc/arctan(x)
-	var/y=arcsin(x/sqrt(1+x*x))
-	return y
-
 //returns random gauss number
 proc/GaussRand(var/sigma)
   var/x,y,rsq