remove most top-level vardecls (#23946)

code/datums/components/orbiter.dm

@@ -376,9 +376,6 @@
 // Atom procs/vars
 ///////////////////////////////////
 
-/// UID for the atom which the current atom is orbiting
-/atom/movable/var/orbiting_uid = null
-
 /**
  * Set an atom to orbit around another one. This atom will follow the base atom's movement and rotate around it.
  *

code/datums/datum.dm

@@ -9,6 +9,9 @@
 	var/var_edited = FALSE //Warranty void if seal is broken
 	var/tmp/unique_datum_id = null
 
+	/// Used by SSprocessing
+	var/isprocessing = FALSE
+
 /**
   * A cached version of our \ref
   * The brunt of \ref costs are in creating entries in the string tree (a tree of immutable strings)