drop old and unused crypt auth (#1026)

pgjdbc/src/main/java/org/postgresql/core/v3/ConnectionFactoryImpl.java

@@ -27,7 +27,6 @@
import org.postgresql.util.PSQLException;
import org.postgresql.util.PSQLState;
import org.postgresql.util.ServerErrorMessage;
import org.postgresql.util.UnixCrypt;

import java.io.IOException;
import java.net.ConnectException;
@@ -456,35 +455,6 @@ private void doAuthentication(PGStream pgStream, String host, String user, Prope

            // Process the request.
            switch (areq) {
              case AUTH_REQ_CRYPT: {
                byte[] salt = pgStream.receive(2);

                if (LOGGER.isLoggable(Level.FINEST)) {
                  LOGGER.log(Level.FINEST, " <=BE AuthenticationReqCrypt(salt=''{0}'')", new String(salt, "US-ASCII"));
                }

                if (password == null) {
                  throw new PSQLException(
                      GT.tr(
                          "The server requested password-based authentication, but no password was provided."),
                      PSQLState.CONNECTION_REJECTED);
                }

                byte[] encodedResult = UnixCrypt.crypt(salt, password.getBytes("UTF-8"));

                if (LOGGER.isLoggable(Level.FINEST)) {
                  LOGGER.log(Level.FINEST, " FE=> Password(crypt=''{0}'')", new String(encodedResult, "US-ASCII"));
                }

                pgStream.sendChar('p');
                pgStream.sendInteger4(4 + encodedResult.length + 1);
                pgStream.send(encodedResult);
                pgStream.sendChar(0);
                pgStream.flush();

                break;
              }

              case AUTH_REQ_MD5: {
                byte[] md5Salt = pgStream.receive(4);
                if (LOGGER.isLoggable(Level.FINEST)) {