dco_win: Remove unused dco_start_tun declaration

This function was removed in commit
1625d92, but the
declaration and the non-Windows definition were
left behind.

Identified by cppcheck.

Change-Id: I395cc722d53201d775c20ae3cf9d50149bfc90ed
Signed-off-by: Frank Lichtenheld <frank@lichtenheld.com>
Acked-by: Gert Doering <gert@greenie.muc.de>
Gerrit URL: https://gerrit.openvpn.net/c/openvpn/+/1863
Message-Id: <20260824161512.1720-1-gert@greenie.muc.de>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg38640.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>

Author: flichtenheld

src/openvpn/dco_win.h

@@ -65,8 +65,6 @@ void dco_mp_start_vpn(HANDLE handle, struct link_socket *sock);
 void dco_p2p_new_peer(HANDLE handle, OVERLAPPED *ov, struct link_socket *sock,
                       struct signal_info *sig_info);
 
-void dco_start_tun(struct tuntap *tt);
-
 bool dco_win_supports_multipeer(void);
 
 void dco_win_add_iroute_ipv4(dco_context_t *dco, in_addr_t dst, unsigned int netbits,
@@ -79,13 +77,5 @@ void dco_win_del_iroute_ipv4(dco_context_t *dco, in_addr_t dst, unsigned int net
 
 void dco_win_del_iroute_ipv6(dco_context_t *dco, struct in6_addr dst, unsigned int netbits);
 
-#else  /* if defined(ENABLE_DCO) && defined(_WIN32) */
-
-static inline void
-dco_start_tun(struct tuntap *tt)
-{
-    ASSERT(false);
-}
-
 #endif /* defined(_WIN32) */
 #endif /* ifndef DCO_H */