DEVELOPERS: drop odroidc2 from Dagg Stompler

The odroidc2_defconfig has been dropped in commit
b80712a16ae3deb65331a7923aa878e13e2e66b6, do it no longer makes sense
to list it in the DEVELOPERS file.

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

DEVELOPERS

@@ -576,8 +576,6 @@ F:	arch/Config.in.powerpc
 F:	package/kvm-unit-tests
 
 N:	Dagg Stompler <daggs@gmx.com>
-F:	board/hardkernel/odroidc2
-F:	configs/odroidc2_defconfig
 F:	package/libamcodec/
 F:	package/odroid-mali/
 F:	package/odroid-scripts/