There is no longer an ia64-specific version of the errno.h header
below arch/ia64/include/uapi/asm/, so trying to build tools/bpf
fails with:

  CC       /usr/src/linux/tools/bpf/bpftool/btf_dumper.o
In file included from /usr/src/linux/tools/include/linux/err.h:8,
                 from btf_dumper.c:11:
/usr/src/linux/tools/include/uapi/asm/errno.h:13:10: fatal error: ../../../arch/ia64/include/uapi/asm/errno.h: No such file or directory
   13 | #include "../../../arch/ia64/include/uapi/asm/errno.h"
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.

Thus, just remove the inclusion of the ia64-specific errno.h so that
the build will use the generic errno.h header on this target which was
used there anyway as the ia64-specific errno.h was just a wrapper for
the generic header.

Fixes: c25f867ddd00 ("ia64: remove unneeded uapi asm-generic wrappers")
Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
---
 tools/include/uapi/asm/errno.h | 2 --
 1 file changed, 2 deletions(-)

 v2:
 - Rephrase summary

diff --git a/tools/include/uapi/asm/errno.h b/tools/include/uapi/asm/errno.h
index 637189ec1ab9..d30439b4b8ab 100644
--- a/tools/include/uapi/asm/errno.h
+++ b/tools/include/uapi/asm/errno.h

@@ -9,8 +9,6 @@
 #include "../../../arch/alpha/include/uapi/asm/errno.h"
 #elif defined(__mips__)
 #include "../../../arch/mips/include/uapi/asm/errno.h"
-#elif defined(__ia64__)
-#include "../../../arch/ia64/include/uapi/asm/errno.h"
 #elif defined(__xtensa__)
 #include "../../../arch/xtensa/include/uapi/asm/errno.h"
 #else