Merge branch 'jk/mark-unused-parameters'

Mark unused parameters as UNUSED to squelch -Wunused warnings.

* jk/mark-unused-parameters:
  t-hashmap: stop calling setup() for t_intern() test
  scalar: mark unused parameters in dummy function
  daemon: mark unused parameters in non-posix fallbacks
  setup: mark unused parameter in config callback
  test-mergesort: mark unused parameters in trivial callback
  t-hashmap: mark unused parameters in callback function
  reftable: mark unused parameters in virtual functions
  reftable: drop obsolete test function declarations
  reftable: ignore unused argc/argv in test functions
  unit-tests: ignore unused argc/argv
  t/helper: mark more unused argv/argc arguments
  oss-fuzz: mark unused argv/argc argument
  refs: mark unused parameters in do_for_each_reflog_helper()
  refs: mark unused parameters in ref_store fsck callbacks
  update-ref: mark more unused parameters in parser callbacks
  imap-send: mark unused parameter in ssl_socket_connect() fallback

t/unit-tests/t-strvec.c

@@ -19,7 +19,7 @@
 		} \
 	} while (0)
 
-int cmd_main(int argc, const char **argv)
+int cmd_main(int argc UNUSED, const char **argv UNUSED)
 {
 	if_test ("static initialization") {
 		struct strvec vec = STRVEC_INIT;