Remove unimplemented function

This looks like a leftover from the time this library got imported.

Change-Id: Ied6dca1b0aa95a1ad4ff03d56b5f4f030b5a44f9
diff --git a/src/netconf-client.h b/src/netconf-client.h
index 8162b64..bd89e6b 100644
--- a/src/netconf-client.h
+++ b/src/netconf-client.h
@@ -26,7 +26,6 @@
 public:
     Session(struct nc_session* session);
     ~Session();
-    static std::unique_ptr<Session> viaSSH(const std::string& host, const uint16_t port, const std::string& user);
     static std::unique_ptr<Session> connectPubkey(const std::string& host, const uint16_t port, const std::string& user, const std::string& pubPath, const std::string& privPath);
     static std::unique_ptr<Session> connectSocket(const std::string& path);
     std::vector<std::string_view> capabilities() const;