DEVELOPERS: Remove email at pcre2

I'm going to leave current company and
this mail address is going to become invalid.

Signed-off-by: Naoki Matsumoto <n-matsumoto@melcoinc.co.jp>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

DEVELOPERS

@@ -1262,9 +1262,6 @@ N:	Murat Demirten <mdemirten@yh.com.tr>
 F:	package/jpeg-turbo/
 F:	package/libgeotiff/
 
-N:	Naoki Matsumoto <n-matsumoto@melcoinc.co.jp>
-F:	package/pcre2/
-
 N:	Nathan Lynch <ntl@pobox.com>
 F:	package/chrony/