🔥 Drop redundant SASLAdapter#auth_capable?

It simply delegates to #client, so there's no need to redefine it here.

Author: nevans

lib/net/imap/sasl_adapter.rb

@@ -12,7 +12,6 @@ class SASLAdapter < SASL::ClientAdapter
 
       def response_errors;          RESPONSE_ERRORS                 end
       def sasl_ir_capable?;         client.capable?("SASL-IR")      end
-      def auth_capable?(mechanism); client.auth_capable?(mechanism) end
       def drop_connection;          client.logout!                  end
       def drop_connection!;         client.disconnect               end
     end