Remove misplaced bakery.toml (copy-pasted from bos-settings)

bos is ISO-only (release-iso.yml); it has never been bakery-distributed.
This file was a byte-for-byte copy of bos-settings/bakery.toml (name,
binaries, description all describe bos-settings, not bos) and isn't
referenced by the bread-ecosystem registry or any workflow in this repo.
DESIGN.md already documents that bos-settings — not bos — is the one
meant to get a bakery.toml and a registry entry.

bakery.toml

@@ -1,12 +0,0 @@
-name = "bos-settings"
-description = "System settings app for Bread OS"
-binaries = ["bos-settings"]
-system_deps = ["gtk4", "glib2"]
-optional_system_deps = ["snapper"]
-bread_deps = []
-
-[config]
-dir = "~/.config"
-
-[install]
-post_install = []