Resolve clippy::needless_question_mark

    error: question mark operator is useless here
      --> src/helpers.rs:86:16
       |
    86 |         return Ok(const_val.check_init()?);
       |                ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try removing question mark and `Ok()`: `const_val.check_init()`
       |
       = note: `-D clippy::needless-question-mark` implied by `-D clippy::all`
       = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_question_mark

Author: dtolnay

src/helpers.rs

@@ -83,7 +83,7 @@ pub trait EvalContextExt<'mir, 'tcx: 'mir>: crate::MiriEvalContextExt<'mir, 'tcx
         let cid = GlobalId { instance, promoted: None };
         let const_val = this.eval_to_allocation(cid)?;
         let const_val = this.read_scalar(&const_val.into())?;
-        return Ok(const_val.check_init()?);
+        const_val.check_init()
     }
 
     /// Helper function to get a `libc` constant as a `Scalar`.

src/lib.rs

@@ -19,7 +19,6 @@
     clippy::if_same_then_else,
     clippy::manual_map,
     clippy::needless_lifetimes,
-    clippy::needless_question_mark,
     clippy::needless_return,
     clippy::new_without_default,
     clippy::op_ref,