refactor: Remove stick type from trigger_stick_explosive

fgd/brush/trigger/trigger_stick_explosive.fgd

@@ -1,15 +1,8 @@
 @SolidClass base(Trigger)
 	appliesto(MOMENTUM)
 	line(255 255 255, targetname, filtername)
-= trigger_stick_explosive : "Conc grenades, stickybombs, and other explosives will stick to or inside this area."
+= trigger_stick_explosive : "Conc grenades, stickybombs, and other explosives will stick when colliding with anything inside this area."
 	[
-	stick_type[engine](integer) : "Method of explosive stick." : 0
-	stick_type(choices) : "Method of explosive stick." : 0 =
-		[
-		0: "Stick on collision inside this area."
-		1: "Stick on entering this area."
-		]
-
 	// Inputs
 	input Stick(void) : "Sticks all explosives in this area"
 	input Unstick(void) : "Unsticks all explosives in this area"