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diff --git a/gcc/testsuite/gcc.dg/cpp/undef2.c b/gcc/testsuite/gcc.dg/cpp/undef2.c
deleted file mode 100644
index 4e6a690d..00000000
--- a/gcc/testsuite/gcc.dg/cpp/undef2.c
+++ /dev/null
@@ -1,25 +0,0 @@
-/* C99 6.10.8 para 4: None of [the predefined macro names] shall be
-   the subject of a #define or an #undef preprocessing directive.  We
-   pass -fno-show-column as otherwise dejagnu gets confused.  */
-
-/* { dg-do preprocess } */
-/* { dg-options "-fno-show-column" } */
-
-#undef __DATE__		/* { dg-warning "undefining" "__DATE__" } */
-#undef __TIME__		/* { dg-warning "undefining" "__TIME__" } */
-#undef __FILE__		/* { dg-warning "undefining" "__FILE__" } */
-#undef __LINE__		/* { dg-warning "undefining" "__LINE__" } */
-#undef __STDC__		/* { dg-warning "undefining" "__STDC__" } */
-
-/* These should be protected from #undef, but aren't, because they
-   are set with normal #define commands - and on top of that, some
-   of them are library properties, outside our control.  To consider:
-   warn about undefining/redefining any identifier beginning with
-   __STDC_ .
-
-   __STDC_HOSTED__
-   __STDC_VERSION__
-   __STDC_IEC_559__
-   __STDC_IEC_559_COMPLEX__
-   __STDC_ISO_10646__
- */