arm64: signal: Remove unused macro

Commit 33f0826 ("arm64: signal: Allow expansion of the signal
frame") introduced the BASE_SIGFRAME_SIZE macro but it has
apparently never been used; just remove it.

Reviewed-by: Dave Martin <[email protected]>
Acked-by: Catalin Marinas <[email protected]>
Signed-off-by: Kevin Brodsky <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>

Author: kevin-brodsky-arm

arch/arm64/kernel/signal.c

@@ -79,7 +79,6 @@ struct user_access_state {
 	u64 por_el0;
 };
 
-#define BASE_SIGFRAME_SIZE round_up(sizeof(struct rt_sigframe), 16)
 #define TERMINATOR_SIZE round_up(sizeof(struct _aarch64_ctx), 16)
 #define EXTRA_CONTEXT_SIZE round_up(sizeof(struct extra_context), 16)