remove audio modules in favor of playerctl

[lasers]

This remove clementine, gpmdp, and player_control in favor of playerctl .

clementine

• IIRC, code have mpris-1/mpris-2 issue. Also, old.
• New module from scratch if implemented again.
• Only one placeholder. Use playerctl instead.

gpmdp

• Deprecated. Link doesn't work too.
• Google's current solution might be to use Chrome to make and use Youtube app shortcut instead.
• Run extra remote-cmd calls every time based on number of placeholders.
• No longer available on many distributions. Use playerctl instead.

player_control

• Designed specifically for two players only.
• Lot of old and simple code. No py3 helpers.
• Only one placeholder {icon}. Use playerctrl instead.

mpris and spotify probably still have some users.

/cc @jdholtz, author of playerctl

[ultrabug]

Fair enough, thanks