maint: remove gl/lib/reg*.c.diff; no longer needed

* gl/lib/regcomp.c.diff: Remove file, now that gnulib's
regcomp.c compiles regex.c with -Wno-unused-parameter.
* gl/lib/regex_internal.h.diff: Likewise.
* gl/lib/regex_internal.c.diff: This file induced a change to ensure
that the "Idx" type was unsigned and to remove a few "VAR < 0"
comparisons.  These days, it is probably fine to stay in sync with
gnulib/glibc's copies
of these files, so remove these patches, too.
* gl/lib/regexec.c.diff: Likewise.
Prompted by a report by Assaf Gordon and a suggestion from Paul Eggert.

1 files changed, 0 insertions, 25 deletions

diff --git a/gl/lib/regex_internal.c.diff b/gl/lib/regex_internal.c.diff
deleted file mode 100644
index 2a72e0de7..000000000
--- a/gl/lib/regex_internal.c.diff
+++ /dev/null
@@ -1,25 +0,0 @@
-diff --git a/lib/regex_internal.c b/lib/regex_internal.c
-index 93d7ee9..9b86a07 100644
---- a/lib/regex_internal.c
-+++ b/lib/regex_internal.c
-@@ -17,6 +17,8 @@
-    License along with the GNU C Library; if not, see
-    <http://www.gnu.org/licenses/>.  */
- 
-+#include "verify.h"
-+#include "intprops.h"
- static void re_string_construct_common (const char *str, Idx len,
- 					re_string_t *pstr,
- 					RE_TRANSLATE_TYPE trans, bool icase,
-@@ -1389,7 +1391,10 @@ static void
- internal_function
- re_node_set_remove_at (re_node_set *set, Idx idx)
- {
--  if (idx < 0 || idx >= set->nelem)
-+  verify (! TYPE_SIGNED (Idx));
-+  /* if (idx < 0)
-+     return; */
-+  if (idx >= set->nelem)
-     return;
-   --set->nelem;
-   for (; idx < set->nelem; idx++)