libubox: remove outdated patches

Fixes: e9cabad ("Merge Official Source")

package/libs/libubox/patches/001-add-fallthrough-macro.patch

@@ -1,37 +0,0 @@
-From b8abed7494238c22522b29814c4cc754e3c19d5a Mon Sep 17 00:00:00 2001
-From: Felix Fietkau <nbd@nbd.name>
-Date: Sun, 16 May 2021 17:31:57 +0200
-Subject: [PATCH] utils.h: add fallthrough macro
-
-This can be used to silence clang warnings about unannotated fall-through
-
-Signed-off-by: Felix Fietkau <nbd@nbd.name>
----
- utils.h | 12 ++++++++++++
- 1 file changed, 12 insertions(+)
-
-diff --git a/utils.h b/utils.h
-index 5c53cc0..dacac6e 100644
---- a/utils.h
-+++ b/utils.h
-@@ -226,6 +226,18 @@ int clock_gettime(int type, struct timespec *tv);
- #define __hidden __attribute__((visibility("hidden")))
- #endif
- 
-+#ifndef __has_attribute
-+# define __has_attribute(x) 0
-+#endif
-+
-+#ifndef fallthrough
-+# if __has_attribute(__fallthrough__)
-+#  define fallthrough __attribute__((__fallthrough__))
-+# else
-+#  define fallthrough do {} while (0)  /* fallthrough */
-+# endif
-+#endif
-+
- int b64_encode(const void *src, size_t src_len,
- 	       void *dest, size_t dest_len);
- 
--- 
-2.20.1