build: remove unused anyhow dependency

third_party/crates/anyhow-1.0.104/tests/ui/must-use.rs

@@ -1,11 +0,0 @@
-#![deny(unused_must_use)]
-
-use anyhow::anyhow;
-
-fn main() -> anyhow::Result<()> {
-    if true {
-        // meant to write bail!
-        anyhow!("it failed");
-    }
-    Ok(())
-}