DEVELOPERS: remove Rico Bachmann

His e-mail address is bouncing:

Your message to bachmann@tofwerk.com couldn't be delivered.
bachmann wasn't found at tofwerk.com.
thomas.petazzoni        Office 365      bachmann
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Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

DEVELOPERS

@@ -2096,10 +2096,6 @@ N:	Richard Braun <rbraun@sceen.net>
 F:	package/curlftpfs/
 F:	package/tzdata/
 
-N:	Rico Bachmann <bachmann@tofwerk.com>
-F:	package/apr-util/
-F:	package/subversion/
-
 N:	RJ Ascani <rj.ascani@gmail.com>
 F:	package/azmq/