DEVELOPERS: Remove Markos Chandras

Email bounces:

<markos.chandras@imgtec.com>: host
    mxa-00376f01.gslb.pphosted.com[185.132.180.163] said: 550 5.1.1 User
    Unknown (in reply to RCPT TO command)

Last mailing list postings date back to 2015.

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

DEVELOPERS

@@ -1431,10 +1431,6 @@ F:	boot/riscv-pk/
 F:	configs/qemu_riscv32_virt_defconfig
 F:	configs/qemu_riscv64_virt_defconfig
 
-N:	Markos Chandras <markos.chandras@imgtec.com>
-F:	package/harfbuzz/
-F:	package/libsecret/
-
 N:	Martin Bark <martin@barkynet.com>
 F:	board/raspberrypi/
 F:	configs/raspberrypi3_defconfig