TOOLS: remove youtube-dl_mpv.sh

It lost all reason to exist, since mpv includes ytdl_hook.lua by default.

TOOLS/youtube-dl_mpv.sh

@@ -1,22 +0,0 @@
-#!/bin/sh
-# Example of script for using mpv with youtube-dl
-set -e
-
-cookies_dir="$(mktemp -d /tmp/youtube-dl_mpv.XXXX)"
-cookies_file="${cookies_dir}/cookies"
-user_agent="$(youtube-dl --dump-user-agent)" # or set whatever you want
-
-video_url=$(youtube-dl \
-    --user-agent="${user_agent}" \
-    --cookies="${cookies_file}" \
-    --get-url \
-    "$@")
-
-set -f
-${MPV:-mpv} \
-    --cookies \
-    --cookies-file="${cookies_file}" \
-    --user-agent="${user_agent}" \
-    -- ${video_url}
-
-rm -rf "${cookies_dir}"