arm64: lse: Remove unused 'alt_lse' assembly macro

The 'alt_lse' assembly macro has been unused since 7c8fc35d
("locking/atomics/arm64: Replace our atomic/lock bitop implementations
with asm-generic").

Remove it.
Reviewed-by: Andrew Murray <andrew.murray@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>

arch/arm64/include/asm/lse.h

@@ -10,37 +10,15 @@
 #include <asm/alternative.h>
 #include <asm/cpucaps.h>
 
-#ifdef __ASSEMBLER__
-
-.arch_extension	lse
-
-.macro alt_lse, llsc, lse
-	alternative_insn "\llsc", "\lse", ARM64_HAS_LSE_ATOMICS
-.endm
-
-#else	/* __ASSEMBLER__ */
-
 __asm__(".arch_extension	lse");
 
-
 /* In-line patching at runtime */
 #define ARM64_LSE_ATOMIC_INSN(llsc, lse)				\
 	ALTERNATIVE(llsc, lse, ARM64_HAS_LSE_ATOMICS)
 
-#endif	/* __ASSEMBLER__ */
 #else	/* CONFIG_AS_LSE && CONFIG_ARM64_LSE_ATOMICS */
 
-#ifdef __ASSEMBLER__
-
-.macro alt_lse, llsc, lse
-	\llsc
-.endm
-
-#else	/* __ASSEMBLER__ */
-
-
 #define ARM64_LSE_ATOMIC_INSN(llsc, lse)	llsc
 
-#endif	/* __ASSEMBLER__ */
 #endif	/* CONFIG_AS_LSE && CONFIG_ARM64_LSE_ATOMICS */
 #endif	/* __ASM_LSE_H */