LoongArch: Remove five DIE_* definitions in kdebug.h

For now, DIE_PAGE_FAULT, DIE_BREAK, DIE_SSTEPBP, DIE_UPROBE and
DIE_UPROBE_XOL are not used by any code, remove them.
Tested-by: Jeff Xie <xiehuan09@gmail.com>
Suggested-by: Youling Tang <tangyouling@loongson.cn>
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

arch/loongarch/include/asm/kdebug.h

@@ -13,11 +13,6 @@ enum die_val {
 	DIE_FP,
 	DIE_SIMD,
 	DIE_TRAP,
-	DIE_PAGE_FAULT,
-	DIE_BREAK,
-	DIE_SSTEPBP,
-	DIE_UPROBE,
-	DIE_UPROBE_XOL,
 };
 
 #endif /* _ASM_LOONGARCH_KDEBUG_H */