DEVELOPERS: remove Roman Gorbenkov, e-mail bouncing

<roman.gorbenkov@ens2m.org>: host mxd.relay.renater.fr[194.214.200.9] said: 550
    5.5.0 Requested actions not taken as the mailbox is unavailable (in reply
    to RCPT TO command)

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

DEVELOPERS

@@ -2415,9 +2415,6 @@ F:	support/testing/tests/package/test_glxinfo.py
 F:	support/testing/tests/package/test_openssh.py
 F:	toolchain/
 
-N:	Roman Gorbenkov <roman.gorbenkov@ens2m.org>
-F:	package/davfs2/
-
 N:	Ryan Barnett <ryan.barnett@collins.com>
 F:	package/atftp/
 F:	package/c-periphery/