gcc5: delete unused patch

pkgs/development/compilers/gcc/5/libcxx38-and-above.patch

@@ -1,46 +0,0 @@
-This is a slightly modified version of https://svnweb.freebsd.org/ports/head/lang/gcc5/files/patch-libc%2B%2B?revision=432958&view=co&pathrev=432958,
-which doesn't apply cleanly due to them using a slightly different format of patch from us. I just replaced the .orig file references with a/b paths.
-
---- a/gcc/auto-profile.c 2015-01-18 02:25:42 UTC
-+++ b/gcc/auto-profile.c
-@@ -19,11 +19,9 @@ along with GCC; see the file COPYING3.  
- <http://www.gnu.org/licenses/>.  */
- 
- #include "config.h"
--#include "system.h"
--
--#include <string.h>
- #include <map>
- #include <set>
-+#include "system.h"
- 
- #include "coretypes.h"
- #include "hash-set.h"
---- a/gcc/graphite-isl-ast-to-gimple.c 2017-01-19 21:02:12 UTC
-+++ b/gcc/graphite-isl-ast-to-gimple.c
-@@ -38,6 +38,7 @@ extern "C" {
- #endif
- #endif
- 
-+#include <map>
- #include "system.h"
- #include "coretypes.h"
- #include "hash-set.h"
-@@ -75,7 +76,6 @@ extern "C" {
- #include "tree-scalar-evolution.h"
- #include "gimple-ssa.h"
- #include "tree-into-ssa.h"
--#include <map>
- 
- #ifdef HAVE_isl
- #include "graphite-poly.h"
---- a/gcc/system.h 2015-01-05 12:33:28 UTC
-+++ b/gcc/system.h
-@@ -217,6 +217,7 @@ extern int errno;
- #ifdef __cplusplus
- # include <algorithm>
- # include <cstring>
-+# include <new>
- # include <utility>
- #endif
-