Remove GetPkcs11Id from x509_certificate_model

chrome/common/net/x509_certificate_model.h

Index: chrome/common/net/x509_certificate_model.h
diff --git a/chrome/common/net/x509_certificate_model.h b/chrome/common/net/x509_certificate_model.h
index 16cae484c48f0b7013d5618ae37c08efcca068b9..fe7f06c0d5790f679bdc66620cc6084b8ffcd544 100644
--- a/chrome/common/net/x509_certificate_model.h
+++ b/chrome/common/net/x509_certificate_model.h
@@ -77,10 +77,6 @@ void GetNicknameStringsFromCertList(const net::CertificateList& certs,
                                     const std::string& cert_not_yet_valid,
                                     std::vector<std::string>* nick_names);
 
-// Returns the PKCS#11 attribute CKA_ID for a certificate as an upper-case
-// hex string, or the empty string if none is found.
-std::string GetPkcs11Id(net::X509Certificate::OSCertHandle cert_handle);
-
 struct Extension {
   std::string name;
   std::string value;