Removes datum redeclares (#23950)

* Removes datum redeclares

* conflicts

* thanks vsc

* compile fix

code/modules/lighting/lighting_area.dm

@@ -1,7 +1,3 @@
-/area
-	luminosity           = TRUE
-	var/dynamic_lighting = DYNAMIC_LIGHTING_ENABLED
-
 /area/proc/set_dynamic_lighting(new_dynamic_lighting = DYNAMIC_LIGHTING_ENABLED)
 	if(new_dynamic_lighting == dynamic_lighting)
 		return FALSE

code/modules/lighting/lighting_atom.dm

@@ -1,12 +1,3 @@
-
-/atom
-	var/light_power = 1 // Intensity of the light.
-	var/light_range = 0 // Range in tiles of the light.
-	var/light_color     // Hexadecimal RGB string representing the colour of the light.
-
-	var/tmp/datum/light_source/light // Our light source. Don't fuck with this directly unless you have a good reason!
-	var/tmp/list/light_sources       // Any light sources that are "inside" of us, for example, if src here was a mob that's carrying a flashlight, that flashlight's light source would be part of this list.
-
 // The proc you should always use to set the light of this atom.
 // Nonesensical value for l_color default, so we can detect if it gets set to null.
 #define NONSENSICAL_VALUE -99999

code/modules/lighting/lighting_turf.dm

@@ -1,14 +1,3 @@
-/turf
-	var/dynamic_lighting = TRUE
-	luminosity           = 1
-
-	var/tmp/lighting_corners_initialised = FALSE
-
-	var/tmp/list/datum/light_source/affecting_lights       // List of light sources affecting this turf.
-	var/tmp/atom/movable/lighting_object/lighting_object // Our lighting object.
-	var/tmp/list/datum/lighting_corner/corners
-	var/tmp/has_opaque_atom = FALSE // Not to be confused with opacity, this will be TRUE if there's any opaque atom on the tile.
-
 // Causes any affecting light sources to be queued for a visibility update, for example a door got opened.
 /turf/proc/reconsider_lights()
 	var/datum/light_source/L