[gcc r12-5881] libstdc++: Remove bogus dg-error for effective-target c++20

[Jonathan Wakely]

https://gcc.gnu.org/g:9042302ef06dc8484ee188ebd6c4164ba67d347d

commit r12-5881-g9042302ef06dc8484ee188ebd6c4164ba67d347d
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Thu Dec 9 22:14:57 2021 +0000

    libstdc++: Remove bogus dg-error for effective-target c++20
    
    This test no longer has additional errors for C++20 mode, so remove the
    dg-error that is now failing, and the unnecessary dg-prune-output.
    
    libstdc++-v3/ChangeLog:
    
            * testsuite/20_util/scoped_allocator/69293_neg.cc: Remove
            dg-error for c++20.

Diff:
---
 libstdc++-v3/testsuite/20_util/scoped_allocator/69293_neg.cc | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/libstdc++-v3/testsuite/20_util/scoped_allocator/69293_neg.cc b/libstdc++-v3/testsuite/20_util/scoped_allocator/69293_neg.cc
index fd37374447f..143adc3f51c 100644
--- a/libstdc++-v3/testsuite/20_util/scoped_allocator/69293_neg.cc
+++ b/libstdc++-v3/testsuite/20_util/scoped_allocator/69293_neg.cc
@@ -47,8 +47,4 @@ test01()
   auto p = sa.allocate(1);
   sa.construct(p);  // this is required to be ill-formed
   // { dg-error "failed: .* uses_allocator is true" "" { target *-*-* } 0 }
-  // { dg-error "too many initializers for 'X'" "" { target c++2a } 0 }
 }
-
-// Needed because of PR c++/92193
-// { dg-prune-output "no matching function for call to" }