Remove ERR_LIB_PKCS12.

This is no longer used but, by retaining it, we might miss cases where
code is still testing against it.

Change-Id: I40ed47e41f903aaf2c5e5354d4348f8890021382
Reviewed-on: https://boringssl-review.googlesource.com/2110
Reviewed-by: David Benjamin <davidben@chromium.org>
Reviewed-by: Adam Langley <agl@google.com>

crypto/err/err.c

@@ -645,7 +645,6 @@ static const char *const kLibraryNames[ERR_NUM_LIBS] = {
     "PKCS7 routines",                             /* ERR_LIB_PKCS7 */
     "PKCS8 routines",                             /* ERR_LIB_PKCS8 */
     "X509 V3 routines",                           /* ERR_LIB_X509V3 */
-    "PKCS12 routines",                            /* ERR_LIB_PKCS12 */
     "random number generator",                    /* ERR_LIB_RAND */
     "ENGINE routines",                            /* ERR_LIB_ENGINE */
     "OCSP routines",                              /* ERR_LIB_OCSP */

include/openssl/err.h

@@ -392,7 +392,6 @@ enum {
   ERR_LIB_PKCS7,
   ERR_LIB_PKCS8,
   ERR_LIB_X509V3,
-  ERR_LIB_PKCS12,
   ERR_LIB_RAND,
   ERR_LIB_ENGINE,
   ERR_LIB_OCSP,
@@ -426,7 +425,6 @@ enum {
 #define ERR_R_PKCS7_LIB ERR_LIB_PKCS7
 #define ERR_R_PKCS8_LIB ERR_LIB_PKCS8
 #define ERR_R_X509V3_LIB ERR_LIB_X509V3
-#define ERR_R_PKCS12_LIB ERR_LIB_PKCS12
 #define ERR_R_RAND_LIB ERR_LIB_RAND
 #define ERR_R_DSO_LIB ERR_LIB_DSO
 #define ERR_R_ENGINE_LIB ERR_LIB_ENGINE