build: remove unused anyhow dependency

third_party/crates/anyhow-1.0.104/tests/drop/mod.rs

@@ -1,53 +0,0 @@
-#![allow(clippy::module_name_repetitions)]
-
-use std::error::Error as StdError;
-use std::fmt::{self, Display};
-use std::sync::atomic::{AtomicBool, Ordering};
-use std::sync::Arc;
-
-#[derive(Debug)]
-pub struct Flag {
-    atomic: Arc<AtomicBool>,
-}
-
-impl Flag {
-    pub fn new() -> Self {
-        Flag {
-            atomic: Arc::new(AtomicBool::new(false)),
-        }
-    }
-
-    pub fn get(&self) -> bool {
-        self.atomic.load(Ordering::Relaxed)
-    }
-}
-
-#[derive(Debug)]
-pub struct DetectDrop {
-    has_dropped: Flag,
-}
-
-impl DetectDrop {
-    pub fn new(has_dropped: &Flag) -> Self {
-        DetectDrop {
-            has_dropped: Flag {
-                atomic: Arc::clone(&has_dropped.atomic),
-            },
-        }
-    }
-}
-
-impl StdError for DetectDrop {}
-
-impl Display for DetectDrop {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "oh no!")
-    }
-}
-
-impl Drop for DetectDrop {
-    fn drop(&mut self) {
-        let already_dropped = self.has_dropped.atomic.swap(true, Ordering::Relaxed);
-        assert!(!already_dropped);
-    }
-}