Delete unused test data

dkim/tests/data/ed25519test3.msg

@@ -1,15 +0,0 @@
-DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/simple; d=kitterman.org; 
- i=@kitterman.org; q=dns/txt; s=ed25519; t=1517847601; 
- h=message-id : date : from : to : subject : date : from : 
- subject; bh=wE7NXSkgnx9PGiavN4OZhJztvkqPDlemV3OGuEnLwNo=; 
- b=sEnnE99Xsjpcqa/cNf8k/KQCEgjJ/4tswIKoNvq2q0fFQL6XBORJ2fQb
- Fvt34Tb4sOxlZtBYu01kEJlmGz4uCw==
-Authentication-Results: lists.example.org; arc=none; spf=pass smtp.mfrom=example.com; dmarc=pass
-Received: from localhost
-Message-ID: <example@example.com>
-Date: Mon, 01 Jan 2011 01:02:03 +0400
-From: Test User <test@example.com>
-To: somebody@example.com
-Subject: Testing
-
-This is a test message.

dkim/tests/data/ed25519test3.unsigned.msg

@@ -1,9 +0,0 @@
-Authentication-Results: lists.example.org; arc=none; spf=pass smtp.mfrom=example.com; dmarc=pass
-Received: from localhost
-Message-ID: <example@example.com>
-Date: Mon, 01 Jan 2011 01:02:03 +0400
-From: Test User <test@example.com>
-To: somebody@example.com
-Subject: Testing
-
-This is a test message.