xdp-tools: don't overwrite -W* flags via BPF_CFLAGS

There are no build warnings anymore, and the -Wno-error flag
has been removed from BPF_CFLAGS; so this patch can be dropped.

Signed-off-by: Til Kaiser <mail@tk154.de>

package/network/utils/xdp-tools/patches/024-lib-allow-overwriting-W-flags-via-BPF_CFLAGS.patch

@@ -1,49 +0,0 @@
-From e2d8eae9477f6ba41ab75ad77202f235e34c04f7 Mon Sep 17 00:00:00 2001
-From: Andre Heider <a.heider@gmail.com>
-Date: Wed, 18 Jan 2023 22:30:23 +0100
-Subject: [PATCH] lib: allow overwriting -W* flags via BPF_CFLAGS
-
-The bpf header file situation is a mess, and the default warning
-compiler flags may not be suitable everywhere, especially with -Werror
-in the mix.
-
-Move BPF_CFLAGS further down, so these can be overwritten by builders.
-
-Signed-off-by: Andre Heider <a.heider@gmail.com>
----
- lib/common.mk       | 2 +-
- lib/libxdp/Makefile | 2 +-
- 2 files changed, 2 insertions(+), 2 deletions(-)
-
---- a/lib/common.mk
-+++ b/lib/common.mk
-@@ -111,12 +111,12 @@ $(XDP_OBJ): %.o: %.c $(KERN_USER_H) $(EX
- 	$(QUIET_CLANG)$(CLANG) -S \
- 	    -target $(BPF_TARGET) \
- 	    -D __BPF_TRACING__ \
--	    $(BPF_CFLAGS) \
- 	    -Wall \
- 	    -Wno-unused-value \
- 	    -Wno-pointer-sign \
- 	    -Wno-compare-distinct-pointer-types \
- 	    -Werror \
-+	    $(BPF_CFLAGS) \
- 	    -O2 -emit-llvm -c -g -o ${@:.o=.ll} $<
- 	$(QUIET_LLC)$(LLC) -march=$(BPF_TARGET) -filetype=obj -o $@ ${@:.o=.ll}
- 
---- a/lib/libxdp/Makefile
-+++ b/lib/libxdp/Makefile
-@@ -138,12 +138,12 @@ $(XDP_OBJS): %.o: %.c $(BPF_HEADERS) $(L
- 	$(QUIET_CLANG)$(CLANG) -S \
- 	    -target $(BPF_TARGET) \
- 	    -D __BPF_TRACING__ \
--	    $(BPF_CFLAGS) \
- 	    -Wall \
- 	    -Wno-unused-value \
- 	    -Wno-pointer-sign \
- 	    -Wno-compare-distinct-pointer-types \
- 	    -Werror \
-+	    $(BPF_CFLAGS) \
- 	    -O2 -emit-llvm -c -g -o ${@:.o=.ll} $<
- 	$(QUIET_LLC)$(LLC) -march=$(BPF_TARGET) -filetype=obj -o $@ ${@:.o=.ll}
-