Remove rustfmt.toml
Remove rustfmt.toml

The only flag set, use_try_shorthand, is called unstable in the new rustfmt
version.

Signed-off-by: mulhern <7b51bcf507bcd7afb72bf8663752c0ddbeb517f6@redhat.com>

trgill/stratisd,stratis-storage/stratisd,stratis-storage/stratisd,trgill/stratisd,mulkieran/stratisd,mulkieran/stratisd,stratis-storage/stratisd