Update unix.rs

Author: ChrisDenton

library/std/src/sys/process/unix/unix.rs

@@ -89,7 +89,6 @@ impl Command {
         // The child calls `mem::forget` to leak the lock, which is crucial because
         // releasing a lock is not async-signal-safe.
         let env_lock = sys::env::env_read_lock();
-
         let pid = unsafe { self.do_fork()? };
 
         if pid == 0 {
@@ -860,7 +859,6 @@ impl Command {
             // Safety: -1 indicates we don't have a pidfd.
             let mut p = Process::new(0, -1);
 
-            // FIXME: if a list of paths to search is passed then retry for every path.
             let spawn_res = spawn_fn(
                 &mut p.pid,
                 self.get_program_cstr().as_ptr(),