kbuild: remove unused AS assignment

$(AS) is not used anywhere in the kernel build, hence commit
aa824e0c962b ("kbuild: remove AS variable") killed it.

Remove the left-over code in arch/{arm,arm64}/Makefile.

Signed-off-by: Masahiro Yamada <[e-mail]>
Reviewed-by: Nathan Chancellor <[e-mail]>
Acked-by: Will Deacon <[e-mail]>

arch/arm/Makefile

···
 ifeq ($(CONFIG_CPU_BIG_ENDIAN),y)
 KBUILD_CPPFLAGS	+= -mbig-endian
 CHECKFLAGS	+= -D__ARMEB__
-AS		+= -EB
 KBUILD_LDFLAGS	+= -EB
 else
 KBUILD_CPPFLAGS	+= -mlittle-endian
 CHECKFLAGS	+= -D__ARMEL__
-AS		+= -EL
 KBUILD_LDFLAGS	+= -EL
 endif
 

arch/arm64/Makefile

···
 ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
 KBUILD_CPPFLAGS	+= -mbig-endian
 CHECKFLAGS	+= -D__AARCH64EB__
-AS		+= -EB
 # Prefer the baremetal ELF build target, but not all toolchains include
 # it so fall back to the standard linux version if needed.
 KBUILD_LDFLAGS	+= -EB $(call ld-option, -maarch64elfb, -maarch64linuxb)
···
 else
 KBUILD_CPPFLAGS	+= -mlittle-endian
 CHECKFLAGS	+= -D__AARCH64EL__
-AS		+= -EL
 # Same as above, prefer ELF but fall back to linux target if needed.
 KBUILD_LDFLAGS	+= -EL $(call ld-option, -maarch64elf, -maarch64linux)
 UTS_MACHINE	:= aarch64