Remove the patch for old version of gcc

patches/gcc-9.2.0/0050-remove-extra-defines.diff

@@ -1,51 +0,0 @@
-diff --git a/gcc/config.host b/gcc/config.host
-index 816a0f0..030e829 100644
---- a/gcc/config.host
-+++ b/gcc/config.host
-@@ -93,8 +93,8 @@ esac
- case ${host} in
-   *-darwin*)
-     # Generic darwin host support.
--    out_host_hook_obj=host-darwin.o
--    host_xmake_file="${host_xmake_file} x-darwin"
-+    # out_host_hook_obj=host-darwin.o
-+    # host_xmake_file="${host_xmake_file} x-darwin"
-     ;;
- esac
- 
-diff --git a/include/safe-ctype.h b/include/safe-ctype.h
-index b6d585c..1f4c47f 100644
---- a/include/safe-ctype.h
-+++ b/include/safe-ctype.h
-@@ -120,31 +120,5 @@ extern const unsigned char  _sch_tolower[256];
-    So we include ctype.h here and then immediately redefine its macros.  */
- 
- #include <ctype.h>
--#undef isalpha
--#define isalpha(c) do_not_use_isalpha_with_safe_ctype
--#undef isalnum
--#define isalnum(c) do_not_use_isalnum_with_safe_ctype
--#undef iscntrl
--#define iscntrl(c) do_not_use_iscntrl_with_safe_ctype
--#undef isdigit
--#define isdigit(c) do_not_use_isdigit_with_safe_ctype
--#undef isgraph
--#define isgraph(c) do_not_use_isgraph_with_safe_ctype
--#undef islower
--#define islower(c) do_not_use_islower_with_safe_ctype
--#undef isprint
--#define isprint(c) do_not_use_isprint_with_safe_ctype
--#undef ispunct
--#define ispunct(c) do_not_use_ispunct_with_safe_ctype
--#undef isspace
--#define isspace(c) do_not_use_isspace_with_safe_ctype
--#undef isupper
--#define isupper(c) do_not_use_isupper_with_safe_ctype
--#undef isxdigit
--#define isxdigit(c) do_not_use_isxdigit_with_safe_ctype
--#undef toupper
--#define toupper(c) do_not_use_toupper_with_safe_ctype
--#undef tolower
--#define tolower(c) do_not_use_tolower_with_safe_ctype
- 
- #endif /* SAFE_CTYPE_H */