Remove net-ssh gem

Remove net-ssh gem as added along with updating fog-core from 1.32.1 to 1.35.0 during Rails update from 4.1 to 4.2 in !1902 (merged).

Links

• https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/1902/diffs#de3150c01c3a946a6168173c4116741379fe3579_98_102
• fog-core removed net/ssh/net/scp dep in 1.33.0 https://github.com/fog/fog-core/pull/166