remove dead code (Clang Static Analyzer warning)

Author: karel-m

src/pk/ecc/ecc_sm2.c

@@ -304,7 +304,6 @@ static int s_ecc_sign_hash_sm2(const unsigned char *in, unsigned long inlen,
       modular inverse is blinded with random b
    */
 
-   err = CRYPT_ERROR;
    have_pubkey = 0;
    for (max_iterations = LTC_PK_MAX_RETRIES; max_iterations > 0; max_iterations--) {
       if ((err = ecc_copy_curve(key, &pubkey)) != CRYPT_OK)                     goto cleanup;
@@ -562,7 +561,6 @@ int ecc_encrypt_key_sm2(const unsigned char *in, unsigned long inlen,
    }
 
    /* C1 = scalmult(k, G), (x2, y2) = scalmult(k, PB), mask = KDF(x2 || y2) */
-   err = CRYPT_ERROR;
    have_pubkey = 0;
    for (max_iterations = LTC_PK_MAX_RETRIES; max_iterations > 0; max_iterations--) {
       unsigned long tmplen = c1len;