LoongArch: Remove several syntactic sugar macros for branches

mainline inclusion
from mainline-v5.19
commit ab6e57a6
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I5OHOB
CVE: NA

--------------------------------

These syntactic sugars have been supported by upstream binutils from the
beginning, so no need to patch them locally.
Signed-off-by: NWANG Xuerui <git@xen0n.name>
Signed-off-by: NHuacai Chen <chenhuacai@loongson.cn>

arch/loongarch/include/asm/asmmacro.h

@@ -274,16 +274,4 @@
 	nor	\dst, \src, zero
 .endm
 
-.macro bgt r0 r1 label
-	blt	\r1, \r0, \label
-.endm
-
-.macro bltz r0 label
-	blt	\r0, zero, \label
-.endm
-
-.macro bgez r0 label
-	bge	\r0, zero, \label
-.endm
-
 #endif /* _ASM_ASMMACRO_H */