Rollup merge of rust-lang#152758 - cjgillot:noinit-box, r=RalfJung

Remove ShallowInitBox.

All uses of this were removed by rust-lang#148190
Split from rust-lang#147862

r? @RalfJung

Author: Zalathar

clippy_utils/src/qualify_min_const_fn.rs

@@ -194,7 +194,6 @@ fn check_rvalue<'tcx>(
                 ))
             }
         },
-        Rvalue::ShallowInitBox(_, _) => Ok(()),
         Rvalue::UnaryOp(_, operand) => {
             let ty = operand.ty(body, cx.tcx);
             if ty.is_integral() || ty.is_bool() {