Removes Obsolete, Unused, and Unmaintained overrides (#23232)

* Remove unused override comments and fix a few I found

* remove lighting icon overrides (obsolete)

* remove laz/borg overrides (obsolete)

* Remove the catch-all e-gun override, manually overrides the two severely out of date sprites that we ACTUALLY have updates for

* oop

* removes obsolete surgery table sprite (probably technically too close to Bay's to be using actually)

* Love un-updated pathing

* oop

* this back icon wasn't even on this gun ever was it

* didn't notice this override >:(

code/modules/mining/equipment/lazarus_injector.dm

@@ -6,7 +6,7 @@
  * Becomes malfunctioning when EMP'd.
  * If a hostile mob is revived with a malfunctioning injector, it will be hostile to everyone except whoever revived it and gets robust searching enabled.
  */
-/obj/item/lazarus_injector //SKYRAT EDIT - ICON OVERRIDEN BY AESTHETICS - SEE MODULE
+/obj/item/lazarus_injector
 	name = "lazarus injector"
 	desc = "An injector with a cocktail of nanomachines and chemicals, this device can seemingly raise animals from the dead, making them become friendly to the user. Unfortunately, the process is useless on higher forms of life and incredibly costly, so these were hidden in storage until an executive thought they'd be great motivation for some of their employees."
 	icon = 'icons/obj/medical/syringe.dmi'

code/modules/mining/equipment/mineral_scanner.dm

@@ -1,5 +1,5 @@
 /**********************Mining Scanners**********************/
-/obj/item/mining_scanner//SKYRAT EDIT - ICON OVERRIDEN BY AESTHETICS - SEE MODULE
+/obj/item/mining_scanner
 	desc = "A scanner that checks surrounding rock for useful minerals; it can also be used to stop gibtonite detonations."
 	name = "manual mining scanner"
 	icon = 'icons/obj/device.dmi'