@Override
            public byte[] generateSeed(int numBytes) {
                final byte[] seed = new byte[numBytes];
                random.nextBytes(seed);
                return seed;
            }
Deletes the generated X.509 certificate file and RSA private key file.
core/src/main/java/com/linecorp/armeria/internal/common/util/SelfSignedCertificate.java