some luacheck fixes

graphics/elements/controls/hazard_button.lua

@@ -141,9 +141,7 @@ local function hazard_button(args)
     end
 
     -- handle mouse interaction
-    ---@param event mouse_interaction mouse event
----@diagnostic disable-next-line: unused-local
-    function e.handle_mouse(event)
+    function e.handle_mouse(_)
         if e.enabled then
             -- change text color to indicate clicked
             e.window.setTextColor(args.accent)

graphics/elements/controls/push_button.lua

@@ -48,9 +48,7 @@ local function push_button(args)
     end
 
     -- handle mouse interaction
-    ---@param event mouse_interaction mouse event
----@diagnostic disable-next-line: unused-local
-    function e.handle_mouse(event)
+    function e.handle_mouse(_)
         if e.enabled then
             if args.active_fg_bg ~= nil then
                 -- show as pressed

graphics/elements/controls/switch_button.lua

@@ -63,9 +63,7 @@ local function switch_button(args)
     draw_state()
 
     -- handle mouse interaction
-    ---@param event mouse_interaction mouse event
----@diagnostic disable-next-line: unused-local
-    function e.handle_mouse(event)
+    function e.handle_mouse(_)
         if e.enabled then
             -- toggle state
             e.value = not e.value