Removed 'tsh agent'
Removed 'tsh agent'

Fixes #1126

2.3 had the deprecation warning, this one removes it.

sokoow/teleport,gravitational/teleport,yacloud-io/teleport,yacloud-io/teleport,gravitational/teleport,sokoow/teleport,sokoow/teleport,sokoow/teleport,gravitational/teleport,yacloud-io/teleport,yacloud-io/teleport,sokoow/teleport,gravitational/teleport,gravitational/teleport,yacloud-io/teleport,yacloud-io/teleport,yacloud-io/teleport,gravitational/teleport,sokoow/teleport