Remove commented import path from util_solaris.go / util.go

[Wim]

I'm vendoring/using sshchat for matterbridge and got bitten by this bug golang/go#37747

If your willing to accept the change I can send a PR to remove the // import "golang.org/x/crypto/ssh/terminal" from your sshd/terminal/util_solaris.go and sshd/terminal/util.go

This would help me not to make yet another fork for a dependency :-)

[Andrey Petrov]

Hiya, no objections to removing it. PR away. :)

Alternatively, could also specify a replace clause in the go.mod, up to you.