Remove djgpp-dos target

It is not different to other x-compilations.

Change-Id: Ia582b4cf622e670f1af439095ff58d62554232aa
Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
Reviewed-on: https://review.coreboot.org/20293
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/Makefile b/Makefile
index 14c5cae..6806e14 100644
--- a/Makefile
+++ b/Makefile
@@ -1427,9 +1427,6 @@
 	@rm -rf "$(EXPORTDIR)/flashrom-$(RELEASENAME)"
 	@echo Created "$(EXPORTDIR)/flashrom-$(RELEASENAME).tar.gz"
 
-djgpp-dos: clean
-	make CC=i586-pc-msdosdjgpp-gcc STRIP=i586-pc-msdosdjgpp-strip
-
 libpayload: clean
 	make CC="CC=i386-elf-gcc lpgcc" AR=i386-elf-ar RANLIB=i386-elf-ranlib