microblaze: Remove empty #ifndef __ASSEMBLY__ statement

Likely an unnecessary remainder of the scripted UAPI cleanup that
happened long ago...

Signed-off-by: Thomas Huth <thuth@redhat.com>
Link: https://lore.kernel.org/r/20240502173132.57098-1-thuth@redhat.com
Signed-off-by: Michal Simek <michal.simek@amd.com>

Author: huth

arch/microblaze/include/uapi/asm/setup.h

@@ -14,7 +14,4 @@
 
 #define COMMAND_LINE_SIZE	256
 
-# ifndef __ASSEMBLY__
-
-# endif /* __ASSEMBLY__ */
 #endif /* _UAPI_ASM_MICROBLAZE_SETUP_H */