chore: remove useless tmpfiles.d configuration

This file creates 3 directories:
- /var/lib/homebrew
- /var/cache/homebrew
- /var/home/homebrew

The first 2 directories seem entirely useless. Grepping through the
entire homebrew codebase for mentions of those 2 directories nets
absolutely nothing.

The /var/home/homebrew directory here is problematic. It creates the
directory with the owner set to uid/gid 1000. This breaks usecases where
the user wants to change the owner of this directory, such as for
systems that utilize systemd-homed, or systems that utilize a new
project called brew-proxy.[1]

The directory is already created by brew-setup.service, and it does not
need to be created outside of that. If a user deliberately removes this
directory, it should not be recreated as an empty directory.

[1]: https://codeberg.org/HastD/brew-proxy

Signed-off-by: Hec <hec@heccraft.com>

system_files/usr/lib/tmpfiles.d/homebrew.conf

@@ -1,3 +0,0 @@
-d /var/lib/homebrew 0755 1000 1000 - -
-d /var/cache/homebrew 0755 1000 1000 - -
-d /var/home/linuxbrew 0755 1000 1000 - -