Remove unused var 'errTLSConfigUnavailable' (#29626)
Remove unused var 'errTLSConfigUnavailable' (#29626)

Signed-off-by: yuexiao-wang <cb85382fcdcd61052c05cab964e91e5c6acdef6c@zte.com.cn>
ashfall/cli,e11137/cli,riyazdf/cli,allencloud/cli,allencloud/cli,cpuguy83/cli,docker/cli,redpanda/cli,e11137/cli,thaJeztah/cli,thaJeztah/cli,dnephin/cli,Zebrilee/cli,ashfall/cli,Zebrilee/cli,dnephin/cli,cpuguy83/cli,gdevillele/cli,redpanda/cli,docker/cli,riyazdf/cli