Remove SHA-1 warning, not a problem for HMAC

See https://www.schneier.com/blog/archives/2005/02/sha1_broken.html

lib/cryptcheck/tls/cipher.rb

@@ -69,7 +69,7 @@ module CryptCheck
 				ok = Proc.new { |n| self.send "#{n}?" }
 				{
 						success: %i(pfs).select { |n| ok.call n },
-						warning: %i(sha1).select { |n| ok.call n },
+						warning: %i().select { |n| ok.call n },
 						danger:  %i(des3).select { |n| ok.call n },
 						error:   %i(dss md5 psk srp anonymous null export des rc2 rc4).select { |n| ok.call n }
 				}