linux-user: Remove ELIBBAD from elfload.c

The last use of this fallback was removed in 8e62a71738bc.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
diff --git a/linux-user/elfload.c b/linux-user/elfload.c
index aa0eed6..c032692 100644
--- a/linux-user/elfload.c
+++ b/linux-user/elfload.c
@@ -110,11 +110,6 @@
 #define MAP_DENYWRITE 0
 #endif
 
-/* should probably go in elf.h */
-#ifndef ELIBBAD
-#define ELIBBAD 80
-#endif
-
 #if TARGET_BIG_ENDIAN
 #define ELF_DATA        ELFDATA2MSB
 #else