mpris-widget: delete on mouse::enter code

this code is janky, because the notification is set asynchronously, it
can end up not being cleaned by the mouse exit and then you can end up
with multiple ones. Also, the image field of the table needs to be icon,
but if the icon is an http url like some players print or even a local
file like firefox does, setting the icon causes an error as it can't be
read.

mpris-widget/init.lua

@@ -7,13 +7,11 @@
 -------------------------------------------------
 local awful = require("awful")
 local beautiful = require("beautiful")
-local spawn = require("awful.spawn")
 local watch = require("awful.widget.watch")
 local wibox = require("wibox")
-local naughty = require("naughty")
 local gears = require("gears")
 
-local GET_MPD_CMD = "playerctl -p %s -f '{{status}};{{xesam:artist}};{{xesam:title}};{{mpris:artUrl}}' metadata"
+local GET_MPD_CMD = "playerctl -p %s -f '{{status}};{{xesam:artist}};{{xesam:title}}' metadata"
 
 local TOGGLE_MPD_CMD = "playerctl play-pause"
 local NEXT_MPD_CMD = "playerctl next"
@@ -135,14 +133,13 @@ end
 local function worker()
 
     -- retrieve song info
-    local current_song, artist, player_status, artUrl
+    local current_song, artist, player_status
 
     local update_graphic = function(widget, stdout, _, _, _)
         local words = gears.string.split(stdout, ';')
         player_status = words[1]
         artist = words[2]
         current_song = words[3]
-        artUrl = words[4]
         if current_song ~= nil then
             if string.len(current_song) > 18 then
                 current_song = string.sub(current_song, 0, 9) .. ".."
@@ -181,29 +178,6 @@ local function worker()
             )
     )
 
-
-
-    local notification
-    local function show_status()
-        spawn.easy_async(GET_MPD_CMD, function()
-            notification = naughty.notify {
-                margin = 10,
-                timeout = 5,
-                hover_timeout = 0.5,
-                width = 240,
-                height = 90,
-                title = player_status,
-                text = current_song .. " - " .. artist,
-                image = artUrl
-            }
-        end)
-    end
-
-    mpris_widget:connect_signal("mouse::enter", function()
-        if current_song ~= nil and artist ~= nil then show_status() end
-    end)
-    mpris_widget:connect_signal("mouse::leave", function() naughty.destroy(notification) end)
-
     watch(string.format(GET_MPD_CMD, "'" .. default_player .. "'"), 1, update_graphic, mpris_widget)
 
     return mpris_widget