net/smc: Remove redundant assignment to rc

Variable rc is set to zero but this value is never read as it is
overwritten with a new value later on, hence it is a redundant
assignment and can be removed.

Cleans up the following clang-analyzer warning:

net/smc/af_smc.c:1079:3: warning: Value stored to 'rc' is never read
[clang-analyzer-deadcode.DeadStores].
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/smc/af_smc.c

@@ -1076,7 +1076,6 @@ static int smc_connect(struct socket *sock, struct sockaddr *addr,
 		rc = -EISCONN;
 		goto out;
 	case SMC_INIT:
-		rc = 0;
 		break;
 	}