util/hash: Silence unused parameter warnings in tests

util/hash: Silence unused parameter warnings in tests

delete_and_lookup.c:37:21: warning: unused parameter ‘key’ [-Wunused-parameter]
 badhash(const void *key)
                     ^
delete_and_lookup.c:43:10: warning: unused parameter ‘argc’ [-Wunused-parameter]
 main(int argc, char **argv)
          ^
delete_and_lookup.c:43:23: warning: unused parameter ‘argv’ [-Wunused-parameter]
 main(int argc, char **argv)
                       ^
collision.c:34:10: warning: unused parameter ‘argc’ [-Wunused-parameter]
 main(int argc, char **argv)
          ^
collision.c:34:23: warning: unused parameter ‘argv’ [-Wunused-parameter]
 main(int argc, char **argv)
                       ^
destroy_callback.c:50:10: warning: unused parameter ‘argc’ [-Wunused-parameter]
 main(int argc, char **argv)
          ^
destroy_callback.c:50:23: warning: unused parameter ‘argv’ [-Wunused-parameter]
 main(int argc, char **argv)
                       ^
insert_many.c:46:10: warning: unused parameter ‘argc’ [-Wunused-parameter]
 main(int argc, char **argv)
          ^
insert_many.c:46:23: warning: unused parameter ‘argv’ [-Wunused-parameter]
 main(int argc, char **argv)
                       ^
insert_and_lookup.c:34:10: warning: unused parameter ‘argc’ [-Wunused-parameter]
 main(int argc, char **argv)
          ^
insert_and_lookup.c:34:23: warning: unused parameter ‘argv’ [-Wunused-parameter]
 main(int argc, char **argv)
                       ^
null_destroy.c:32:10: warning: unused parameter ‘argc’ [-Wunused-parameter]
 main(int argc, char **argv)
          ^
null_destroy.c:32:23: warning: unused parameter ‘argv’ [-Wunused-parameter]
 main(int argc, char **argv)
                       ^
random_entry.c:52:10: warning: unused parameter ‘argc’ [-Wunused-parameter]
 main(int argc, char **argv)
          ^
random_entry.c:52:23: warning: unused parameter ‘argv’ [-Wunused-parameter]
 main(int argc, char **argv)
                       ^
remove_null.c:34:10: warning: unused parameter ‘argc’ [-Wunused-parameter]
 main(int argc, char **argv)
          ^
remove_null.c:34:23: warning: unused parameter ‘argv’ [-Wunused-parameter]
 main(int argc, char **argv)
                       ^
replacement.c:34:10: warning: unused parameter ‘argc’ [-Wunused-parameter]
 main(int argc, char **argv)
          ^
replacement.c:34:23: warning: unused parameter ‘argv’ [-Wunused-parameter]
 main(int argc, char **argv)
                       ^

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>