Simplify configuration for cargo deny

Author: djc

deny.toml

@@ -1,11 +1,4 @@
 [licenses]
-allow = ["MPL-2.0"]
 allow-osi-fsf-free = "either"
 copyleft = "warn"
-exceptions = [{ allow = ["ISC", "MIT", "OpenSSL"], name = "ring" }]
 private = { ignore = true }
-
-[[licenses.clarify]]
-name = "ring"
-expression = "ISC AND MIT AND OpenSSL"
-license-files = [{ path = "LICENSE", hash = 0xbd0eed23 }]