config_defaults.h: drop OSE bootm default

Most arches don't support OSE, and this is a new bootm target, so the
likelihood of any board actually wanting this today is fairly low.

Any board who actually wants this can enable it in the board-specific
config without making it a default bloat.
Signed-off-by: NMike Frysinger <vapier@gentoo.org>

include/config_defaults.h

@@ -12,7 +12,6 @@
 /* Support bootm-ing different OSes */
 #define CONFIG_BOOTM_LINUX 1
 #define CONFIG_BOOTM_NETBSD 1
-#define CONFIG_BOOTM_OSE 1
 #define CONFIG_BOOTM_RTEMS 1
 
 #define CONFIG_GZIP 1