fix(release): Ensure php dependencies are installed

And remove old Makefile

Signed-off-by: Carl Schwan <carlschwan@kde.org>

Author: CarlSchwan

Makefile

@@ -2,6 +2,7 @@
 # SPDX-License-Identifier: AGPL-3.0-or-later
 [package]
 before_cmds = [
+	"composer install --no-dev -o",
 	'npm ci',
 	'npm run build'
 ]