switch(4): don't call if_deactivate() at destroy.

[Vitaliy Makkoveev]

Don't call if_deactivate() in switch_clone_destroy(). Following
if_detach() will do this.

Index: sys/net/if_switch.c
===================================================================
RCS file: /cvs/src/sys/net/if_switch.c,v
retrieving revision 1.38
diff -u -p -r1.38 if_switch.c
--- sys/net/if_switch.c 28 Aug 2020 12:01:48 -0000      1.38
+++ sys/net/if_switch.c 1 Jan 2021 22:38:00 -0000
@@ -208,7 +208,6 @@ switch_clone_destroy(struct ifnet *ifp)
        bstp_destroy(sc->sc_stp);
        swofp_destroy(sc);
        switch_dev_destroy(sc);
-       if_deactivate(ifp);
        if_detach(ifp);
        free(sc, M_DEVBUF, sizeof(*sc));