Remove cruft from fusl

fusl/arch/sh/src/__set_thread_area.c

-#include "pthread_impl.h"
-#include "libc.h"
-#include "sh_atomic.h"
-#include <elf.h>
-
-/* Also perform sh-specific init */
-
-#define CPU_HAS_LLSC 0x0040
-
-__attribute__((__visibility__("hidden"))) unsigned __sh_atomic_model, __sh_nommu;
-
-int __set_thread_area(void *p)
-{
-        size_t *aux;
-        __asm__ __volatile__ ( "ldc %0, gbr" : : "r"(p) : "memory" );
-#ifndef __SH4A__
-        if (__hwcap & CPU_HAS_LLSC) {
-                __sh_atomic_model = SH_A_LLSC;
-                return 0;
-        }
-#if !defined(__SH3__) && !defined(__SH4__)
-        for (aux=libc.auxv; *aux; aux+=2) {
-                if (*aux != AT_PLATFORM) continue;
-                const char *s = (void *)aux[1];
-                if (s[0]!='s' || s[1]!='h' || s[2]!='2' || s[3]-'0'<10u) break;
-                __sh_atomic_model = SH_A_IMASK;
-                __sh_nommu = 1;
-                return 0;
-        }
-#endif
-        /* __sh_atomic_model = SH_A_GUSA; */ /* 0, default */
-#endif
-        return 0;
-}