hash: remove some dead code

[ upstream commit 25e3fe362b3ad7484750eb7134bfca8e3fab5703 ]

This macro is not used.

Fixes: 769b2de ("hash: implement RCU resources reclamation")

Signed-off-by: David Marchand <david.marchand@redhat.com>
Reviewed-by: Stephen Hemminger <stephen@networkplumber.org>
Reviewed-by: Tyler Retzlaff <roretzla@linux.microsoft.com>
Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>

lib/hash/rte_cuckoo_hash.h

@@ -29,17 +29,6 @@
 #define RETURN_IF_TRUE(cond, retval)
 #endif
 
-#if defined(RTE_LIBRTE_HASH_DEBUG)
-#define ERR_IF_TRUE(cond, fmt, args...) do { \
-	if (cond) { \
-		RTE_LOG(ERR, HASH, fmt, ##args); \
-		return; \
-	} \
-} while (0)
-#else
-#define ERR_IF_TRUE(cond, fmt, args...)
-#endif
-
 #include <rte_hash_crc.h>
 #include <rte_jhash.h>