[sanitizer] Remove unneeded forward declaration of real_sigaction
@@ -105,10 +105,6 @@ DECLARE_REAL(SIZE_T, strlen, const char *s)
DECLARE_REAL(char*, strncpy, char *to, const char *from, uptr size)
DECLARE_REAL(uptr, strnlen, const char *s, uptr maxlen)
DECLARE_REAL(char*, strstr, const char *s1, const char *s2)
-struct sigaction;
-DECLARE_REAL(int, sigaction, int signum,
- const __sanitizer::__sanitizer_sigaction *act,
- __sanitizer::__sanitizer_sigaction *oldact)
#if !SANITIZER_MAC
#define ASAN_INTERCEPT_FUNC(name) \
