remove most top-level vardecls (#23946)

code/modules/tgui/tgui_panel/audio.dm

@@ -4,7 +4,7 @@
  */
 
 /// Admin music volume, from 0 to 1.
-/client/var/admin_music_volume = 1
+/* check_grep:ignore */ /client/var/admin_music_volume = 1
 
 /**
  * public

code/modules/tgui/tgui_panel/telemetry.dm

@@ -15,11 +15,11 @@
 #define TGUI_TELEMETRY_RESPONSE_WINDOW 30 SECONDS
 
 /// Time of telemetry request
-/datum/tgui_panel/var/telemetry_requested_at
+/* check_grep:ignore */ /datum/tgui_panel/var/telemetry_requested_at
 /// Time of telemetry analysis completion
-/datum/tgui_panel/var/telemetry_analyzed_at
+/* check_grep:ignore */ /datum/tgui_panel/var/telemetry_analyzed_at
 /// List of previous client connections
-/datum/tgui_panel/var/list/telemetry_connections
+/* check_grep:ignore */ /datum/tgui_panel/var/list/telemetry_connections
 
 /**
  * private

code/modules/tgui/tgui_panel/tgui_panel_external.dm

@@ -3,7 +3,7 @@
  * SPDX-License-Identifier: MIT
  */
 
-/client/var/datum/tgui_panel/tgui_panel
+/* check_grep:ignore */ /client/var/datum/tgui_panel/tgui_panel
 
 /**
  * tgui panel / chat troubleshooting verb