Remove some unused argc assignments

Reviewed-by: NRichard Levitte <levitte@openssl.org>

apps/enc.c

@@ -291,7 +291,6 @@ int enc_main(int argc, char **argv)
             break;
         }
     }
-    argc = opt_num_rest();
 
     if (cipher && EVP_CIPHER_flags(cipher) & EVP_CIPH_FLAG_AEAD_CIPHER) {
         BIO_printf(bio_err, "%s: AEAD ciphers not supported\n", prog);

apps/errstr.c

@@ -106,7 +106,6 @@ int errstr_main(int argc, char **argv)
             goto end;
         }
     }
-    argc = opt_num_rest();
 
     ret = 0;
     for (argv = opt_rest(); *argv; argv++) {