tests: cleanup `tests/ui/command/command-exec.rs`

- Remove already stable feature gate and `#![allow(stable_features)]`.
- Replace `ignore-windows` with `only-unix`.
- Replace `ignore-*` with `needs-subprocess`.

1 files changed, 2 insertions, 6 deletions

diff --git a/tests/ui/command/command-exec.rs b/tests/ui/command/command-exec.rs
index d2545b0b472..77336377e88 100644
--- a/tests/ui/command/command-exec.rs
+++ b/tests/ui/command/command-exec.rs
@@ -1,13 +1,9 @@
 //@ run-pass
 
-#![allow(stable_features)]
-//@ ignore-windows - this is a unix-specific test
-//@ ignore-wasm32 no processes
-//@ ignore-sgx no processes
+//@ only-unix (this is a unix-specific test)
+//@ needs-subprocess
 //@ ignore-fuchsia no execvp syscall provided
 
-#![feature(process_exec)]
-
 use std::env;
 use std::os::unix::process::CommandExt;
 use std::process::Command;