Remove old test macros.

include/oauth_test_macros.hrl

@@ -1,15 +0,0 @@
--define(plaintext_signature_test(ConsumerSecret, TokenSecret, ExpectedSignature),
-  ?_assertEqual(ExpectedSignature, oauth_crypto:plaintext_signature(ConsumerSecret, TokenSecret))
-).
-
--define(normalize_test(ExpectedString, Params),
-  ?_assertEqual(ExpectedString, oauth_base:normalize(Params))
-).
-
--define(base_string_test(Method, URL, Params, Expected), fun() ->
-  ?assertEqual(string:join(Expected, ""), oauth_base:string(Method, URL, Params))
-end).
-
--define(hmac_signature_test(ExpectedSignature, ConsumerSecret, TokenSecret, BaseString), fun() ->
-  ?assertEqual(ExpectedSignature, oauth_crypto:hmac_signature(string:join(BaseString, []), ConsumerSecret, TokenSecret))
-end).