remove unnecessary filtering logic

Co-authored-by: Boxy <rust@boxyuwu.dev>

Author: reddevilmidzy

compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs

@@ -2838,9 +2838,6 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ {
         };
 
         lit_input
-            // Allow the `ty` to be an alias type, though we cannot handle it here, we just go through
-            // the more expensive anon const code path.
-            .filter(|l| !l.ty.has_aliases())
             .and_then(|l| {
                 tcx.at(expr.span)
                     .lit_to_const(l)