fix unused-parameter warning

[karel-m]

A fix for warnings like this:

ltc/hashes/sha1_desc.c: In function ‘sha1_test_desc’:
ltc/hashes/sha1_desc.c:132:54: error: unused parameter ‘desc’ [-Werror=unused-parameter]
  132 | int sha1_test_desc(const struct ltc_hash_descriptor *desc, const char *name)
      |                    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~
ltc/hashes/sha1_desc.c:132:72: error: unused parameter ‘name’ [-Werror=unused-parameter]
  132 | int sha1_test_desc(const struct ltc_hash_descriptor *desc, const char *name)
      |                                                            ~~~~~~~~~~~~^~~~