Remove ScriptTriggers from map deco actors

Removes it from destroyed fields, trees and rocks in RA and C&C.

This trait isn't free in terms of performance due to all the
INotify* calls, and the mentioned actors should rarely
- if ever - need it. Besides, if a mission ever really needs
this on those actors, the trait can be added back via
map rules.

mods/cnc/rules/defaults.yaml

@@ -832,7 +832,6 @@
 		Palette: terrain
 	WithSpriteBody:
 	FrozenUnderFog:
-	ScriptTriggers:
 	MapEditorData:
 		Categories: Husk
 
@@ -923,7 +922,6 @@
 		MinimumDamageState: Heavy
 		MaximumDamageState: Dead
 	HiddenUnderShroud:
-	ScriptTriggers:
 	HitShape:
 	MapEditorData:
 		Categories: Tree
@@ -946,7 +944,6 @@
 		Name: Tree (Burnt)
 		ShowOwnerRow: false
 	HiddenUnderShroud:
-	ScriptTriggers:
 	MapEditorData:
 		Categories: Tree
 	RequiresSpecificOwners:
@@ -994,7 +991,6 @@
 	AppearsOnMapPreview:
 		Terrain: Tree
 	HiddenUnderShroud:
-	ScriptTriggers:
 	MapEditorData:
 		RequireTilesets: DESERT
 		Categories: Decoration