unix: sometimes a safety comment is a prayer

Co-authored-by: Jonas Böttiger <[email protected]>

library/std/src/sys/pal/unix/stack_overflow.rs

@@ -96,10 +96,7 @@ mod imp {
         _data: *mut libc::c_void,
     ) {
         let (start, end) = GUARD.get();
-        if info.is_null() || !info.is_aligned() {
-            rtabort!("signal handler passed null/non-aligned siginfo_t ptr")
-        };
-        // SAFETY: we've done our due diligence, so assume the pointer is to a real siginfo_t
+       // SAFETY: this pointer is provided by the system and will always point to a valid `siginfo_t`.
         let addr = unsafe { (*info).si_addr() as usize };
 
         // If the faulting address is within the guard page, then we print a